Because she played the most annoying self-centered hot chick on That '70s Show and needs to be taken down a peg (which rhymes with Meg).
"Okay, but if I win you have to stick your head in Meg's hat and take an eight-second whiff."
"Hey Meg, did you get less ugly?"
"That's worse than that time I walked in on Meg doing that gross butt-floss thing."
*camera cuts, Stewie walks into Meg's room*
"Eww, eww, I hope I don't ever accidentally use that towel."
*towel gets thrown on him, he screams and passes out."
*Stewie's head is rotated so it's pointing up*
"Hey, from this position I can hear Meg upstairs."
*camera cuts to Meg, holding a package of hot dogs*
"I'm going to pretend you're the New York Nicks."
*Meg walks in a mentions that she's found religion.*
*Peter looks at the camera*
"Yep, it's going to be a Meg episode. Here's the clicker. Wouldn't blame you."
*Bill Clinton finishes playing the theme to Night Court on saxophone*
*Meg runs up to him, stripped down to her underwear*
"You can have me."
"Heh-heh-heh-heh-heh-heh-heh-heh-eew."
*Meg is being held hostage by burglars*
"So...is this the part where you have your way with me?"
"What?!"
*man calls from other room*
"What'd she say?"
"She asked if we were going to have our way with her!"
"Eeeeeeew!"
~Harm
Best scripting ever. Enough to make Youtube look like cheating.
-- Sam the Methid Man