Should Have Thought of That Before X

"Principal Skinner: Over here, Simpson! The detention room is dangerously overcrowded so you'll be spending your time in the cafeteria. Student: Oxygen running out... Principal Skinner: Yes, you should have thought of that before you made that paper airplane."

- The Simpsons

So a particular situation, severe or trivial, could whether rightly or wrongly be perceived as character A's fault, by character A or by another character, based on point [X]. Cue a Stock Phrase of one of two forms:

"I should have thought of that before [X]." if said by character A.

OR

"You should have thought of that before [X]." if said by another character.

Film
"Maroni: This madness... it's just too much. Gordon: You should have thought of that before you let that clown out of the box."
 * The Dark Knight

"Yzma: It is no concern of mine whether or not your family has...what was it again? Peasant: Umm...food? Yzma: Ha! You should have thought of that before you became peasants!"
 * The Emperors New Groove

"Guard: For the last time, we did NOT order a giant trampoline! Salesman: You know, pal, you could have told me that before I set it up."
 * And another one of the more trivial variety:

"Palumbo: Don't you think it's time for a wedding? Zalmie: How can I ask her? I don't have a cent. Palumbo: You should have thought of that before you got her pregnant."
 * American Pop

"Ludwig Van Beethoven: Where are the pens! I need a pen! Schindler: You should have thought of that before you destroyed the last one!"
 * Beethoven Lives Upstairs

Live Action TV
"Kalvin: This is none of your business! House: Well, you should have thought of that before you stalked me. Now I'm interested."
 * House episode "Hunting"

"Isaac Mendez: How am I supposed to pretend this didn't happen? Candice Wilmer: Maybe you should have thought about that before you shot her. Twice."
 * Heroes episode "Chapter Eighteen 'Parasite'"

"Alexis: [Hates the fact that Daniel is seeing her ex-girlfriend] Daniel: You're just jealous because I've got the one thing you can't have. Guess you should have thought of that before you gave away the family jewels, huh?"
 * Ugly Betty episode "A Tree Grows in Guadalajara"

"Caroline: Hey! That *is* my brain! I want my brain back! I want back in my brain! Alpha: You should have thought of that before you vacated the premises."
 * Dollhouse episode "Omega"


 * In one disturbing example from Law and Order Special Victims Unit, a man is framed for raping a teenage girl, and is subsequently abused in prison. He pleads with the officers for protection but they just tell him, "You should have thought about the pecking order before you raped that girl."

Theatre
"Sergeant of Police: It is most distressing to us to be the agents whereby our erring fellow-creatures are deprived of that liberty which is so dear to us all-- but we should have thought of that before we joined the force."
 * From Gilbert and Sullivan's The Pirates of Penzance:

Web Original
"Mr Quinzel: I just don't want to have anything happen to my daughter. The Joker: Probably should've thought of that before you gave her away."
 * The Joker Blogs

Western Animation
"Lisa: Oh! It's the last day of the Isis exhibit! Bart: Well, you should have thought of that BEFORE I glued all this stuff to my face!"
 * Aside from the current page quote, The Simpsons provides another example that sort of toys with this. In "Lost Our Lisa", Lisa can't go to the Isis Exhibit because Marge has to take Bart to the hospital to get the novelty items he glued to his face removed, leading to this exchange:

"Homer: Aw, come on, everybody. This bar is like a tavern to me. Moe: Sorry, Homer, you should have thought of that before you gave me the old sugar-me-do."
 * Occurred another time when Homer gets banned from Moe's Tavern after pranking Moe by unscrewing a lid to a jar of sugar.

"Robber: [Bats come swarming out of the shadows] Who's there? I don't want any trouble. Robin: You should have thought about that before you committed the crime!"
 * Teen Titans.

"Lianne: I mean, what right do I have bringing another child into this overpopulated world? Then again, I should have thought of that before having sex..."
 * In the South Park two-parter "Cartman's Mom Is a Dirty Slut" when Lianne is talking about abortion: