So Bad It's Horrible/Other Media

Because awfulness isn't limited just to media. This is the place for horrible stuff that doesn't have a category of its own,

Important Notes:
 * 1) Merely being offensive in its subject matter is not enough to justify a work as So Bad It's Horrible. Hard as it is to imagine at times, there is a market for all types of deviancy (no matter how small a niche it is). It has to fail to appeal even to that niche to qualify as this.
 * 2) It isn't horrible stuff just because some Caustic Critic reviewed it. There needs to be independent evidence, such as actual critics (emphasis on plural) for example, to list it. (Though once it is listed, they can provide the detailed review.)

Conventions

 * DashCon, a 2014 Tumblr-themed convention that from the moment it opened quickly become the standard for horribly mismanaged public events. Disastrously organized by complete newbies, the event was marred by such things as: artists being unpaid and consequently cancelling their presentations; the organizers neglecting to inform the attendees about cancelled events until the last moment (most notoriously pulled with the very announced panel with the cast of Welcome to Night Vale and with a concert by Steam Powered Giraffe that Dashcon kept promoting despite the fact that the band didn't even have such a presentation listed in their official site); offering the angry con-goers "an extra hour at the ball pit" (actually a half inflated kid-sized ball pit languishing alone in the empty convention room, an image that became synonymous with the event) as compensation for the cancelled events; invitees having to moderate their own panels; having an impromptu donation drive to get $17,000 to cover the hotel costs on the very first night (thus creating suspicions of fraud); complete disrespect towards the vendors; an incredibly low attendance (they expected at least 3,000, but instead received 1,500 at most, a high percentage of them underage); and security so low, a /pol/ citizen managed to infiltrate the event and film it with impunity.
 * The disaster got instantly memetic, with the infamous ball pit at the center of the jokes. Apparently someone actually peed in the pit, and rumors went wild about how people contracted infections of a venereal nature from playing on it.
 * When the only invitees who defended your event were the one that actually got paid on full and the panelist that was accustomed to pay for his expenses, you know you did it wrong.
 * There is even a theory on how Dashcon marked the beginning of the end of the SuperWhoLock megafandom. Granted, all these series suffered long hiatuses and/or severe Seasonal Rot at the time, but since the event bent heavily towards their joint fandom, the failure of the con was the turning point where people either became distant from the fandom or stopped claiming public affiliation to it.
 * Before Dashcon, there was Tentmoot, an infamous 2003 Lord of the Rings convention that was cancelled the same day it was supposed to begin (even having some guests stranded), due to both low sales and the spectacular mismanagement and outright conning of its organizer, an individual known at the time as Jordan Wood - later revealed to be a young woman named Amy Player, that has been in the LOTR fandom under several other aliases and had stirred drama with each one of those. The whole thing generated an actual legal investigation for fraud, a tell-all book by one of then persons involved in the clusterfuck, and rivers of digital ink. To make a long story short: Ms. Player essentially lied, conned, and manipulated people into (badly) organizing several events, with the convention as the expected gem of the crown, because she allegedly wanted to get enough funds to move with her girlfriend and transition into a male identity. And the antics of this individual didn't end there; you may know her as the author of the infamous Harry Potter fanfic Dumbledore's Army and the Year of Darkness.

Foodstuff

 * The Sugar Free Gummy Bears produced by Haribo. Apparently, their formula contained a disproportionately high amount of maltitol, a low-calorie sugar substitute that can't be properly digested by the human body and tend to cause flatulence and diarrhea on their road out of the digestive system (Potty Failure being a non-infrequent consequence). The best you can say about these sweets is that they are very good colon cleansers. It also led to several hilarious Amazon reviews.
 * Olestra, a fake-fat touted to be an oil substitute for foodstuff. In practice, it deprived the organism of whatever nutrients food containing it may have had, caused abdominal cramping and flatulence, and have a tendency to getting out of the body fast and swiftly. It was quickly discontinued on most countries, even if the FDA keeps on its approved food additives lists. Time Magazine included it among the worst 50 inventions ever. It eventually got secondary uses... as firearms lubricant, and as a treatment for certain types of poisoning, especially those involving otherwise long-lasting toxins.

Operating Systems

 * Microsoft BOB was a laughable excuse for a "beginner" operating system. The concept was that the system was a "house", divided into several cartoony "rooms", where to open a program you should have to press the corresponding appliance. It had a user/password system, but if you failed three attempts the system gave access to you anyway. The problems with this approach to security should be obvious. It was disliked by users who understandably didn't want to be babied, and it was quickly killed by Windows 95, which proved to be more usable and less childish. Still, its legacy lives on in Clippy the Office Assistant and the controversial font Comic Sans, both of them created for this abomination.
 * Microsoft Windows Millennium Edition, arguably the worst product ever released by Microsoft (and given the amount of crap they have released, that's not an easy feat). It was a bug-ridden mess that was notoriously insecure, unstable, and incompatible with a good amount of software and hardware, and leaked memory like the Niagara Falls leak water. It was planned as a "transitional system" between the 9X line and the NT line but it was so awfully programmed it did not do what transitional systems are allotted to do. No wonder they ended up pushing Windows XP (based on the most stable NT) less than 1 year after ME's release.