Romney has been getting a reputation for being a little too stiff. So his campaign pointed to his wacky hi-jinx years in high school to show that he likes to have fun just like the next guy.
If he is pointing to his past to show what kind of person he is, then it's perfectly fair to actually look at his past, warts and all.
The Washington Post has the
whole story. Probably more than you want to read about Romney in high school.