My school made me delete my twitter account (repost)?

[Dexter Morgan]

(this is not a joke) Recently my school forced me to log onto my email so as they could read my emails because they thought I had created a parody twitter account of another student (with no evidence, I didn't make it) Is this legal? To further this, I had retweeted (on twitter) a picture that seemed comical at the time, of a boy in my school who willingly took a picture of himself sticking a broom up his butt, (none of this had anything directly to do with the school) the school forced my to give them my password to which they deactivated my account and told me that I wasn't allowed to create another, is it just me or does this sound completely unjust? I was not the singular person who had retweeted this as it had many, and also that it was not an uncommon picture to be seen, this picture had gone viral around the whole county and everyone had seen it, and as for those who are going to say i should be on the sex offenders list, I'm 16 and he's in the year below me