I would get why Starlight could get punished, but the worst thing I could imagine for her is receiving a big scolding from a high authority. Or shaking her senses while screaming "Did you just WHAT!?"
Sludge almost ruined the relationship between Spike and Twilight at his own benefit.
Spike: I don't think so. I already know who my real family is.
Twilight Sparkle: Aww! It's me, right?
Sludge: Awww... I love happy endings.
Twilight, Smolder and Spike: >:(
Sludge: Oh oh...
*changes scene with the catapult*
Sludge: W-Wait! We can argue this!
Spike: Good bye, _dad_.
*Activates the catapult*
Sludge: *Goofy scream while flying away*