Topic on All The Tropes talk:How We Do Bans Around Here
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Thanks, LT.
As for the schedule: It seems to me that a one-day or shorter tempban doesn't do much, especially if the offender doesn't try to login for a day - a two-day tempban is the shortest that I'd give if I was making the list without input. Beyond that, I'm lazy and wouldn't be averse to using as a list the predefined options that MediaWiki gives us.