I failed to answer your questions. The answers are NO and NO. As this was a public school, the vice principal has absolutely no authority whatsoever to do anything concerning activity occurring outside of school activities and off of school property. Not so much as one word on a blackboard, and I'm guessing these little wonders' parents would be just the type to sue her if she did.
If they were adults and this were their boss, they'd be looking for another job right now. Time the get a little lesson about the grownup world.
First, they're not adults. Second, she's not their boss. Third, there's no evidence she even tried to contact the parents about this. Fourth, she suffered no actual harm from words and obviously doctored pictures. I guess everyone who gets made fun of or is the subject of a photoshopped pic on FR should sue, too.
There's far too many humorless people in this world who can't take a joke.