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.
 * The Dark Knight

Gordon: You should have thought of that before you let that clown out of the box."

"Yzma: It is no concern of mine whether or not your family has...what was it again?
 * The Emperors New Groove

Peasant: Umm...food?

Yzma: Ha! You should have thought of that before you became peasants!"

"Guard: For the last time, we did NOT order a giant trampoline!
 * And another one of the more trivial variety:

Salesman: You know, pal, you could have told me that before I set it up."

"Palumbo: Don't you think it's time for a wedding?
 * American Pop

Zalmie: How can I ask her? I don't have a cent.

Palumbo: You should have thought of that before you got her pregnant."

"Ludwig Van Beethoven: Where are the pens! I need a pen!
 * Beethoven Lives Upstairs

Schindler: You should have thought of that before you destroyed the last one!"

Live Action TV
"Kalvin: This is none of your business!
 * House episode "Hunting"

House: Well, you should have thought of that before you stalked me. Now I'm interested."

"Isaac Mendez: How am I supposed to pretend this didn't happen?
 * Heroes episode "Chapter Eighteen 'Parasite'"

Candice Wilmer: Maybe you should have thought about that before you shot her. Twice."

"Alexis: [Hates the fact that Daniel is seeing her ex-girlfriend]
 * Ugly Betty episode "A Tree Grows in Guadalajara"

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?"

"Caroline: Hey! That *is* my brain! I want my brain back! I want back in my brain!
 * Dollhouse episode "Omega"

Alpha: You should have thought of that before you vacated the premises."


 * 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 Blogs

The Joker: Probably should've thought of that before you gave her away."

Western Animation
"Lisa: Oh! It's the last day of the Isis exhibit!
 * 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:

Bart: Well, you should have thought of that BEFORE I glued all this stuff to my face!"

"Homer: Aw, come on, everybody. This bar is like a tavern to me.
 * Occurred another time when Homer gets banned from Moe's Tavern after pranking Moe by unscrewing a lid to a jar of sugar.

Moe: Sorry, Homer, you should have thought of that before you gave me the old sugar-me-do."

"Robber: [Bats come swarming out of the shadows] Who's there? I don't want any trouble.
 * Teen Titans.

Robin: You should have thought about that before you committed the crime!"

"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: