This happened in America, of course there's a giant lawsuit against the school district. Folks here will sue a store for a stubbed toe or spilled drink.
Lawsuits. Lawsuits everywhere.
In this case the girl's got a case, what they did to her was terrible, and my votes show as such regarding what I think. I'm not going to jump on the pity party bandwagon and cry misogyny, though, since that solves nothing except feeding complexes. Now, if they can show a pattern of doing this to multiple female students, and not a single male student, then a charge of misogyny wouldn't look silly and would have merit.
I mean, it's not like idiot school officials have ever been unfair to boys, right?