false acusations - sex scandal?

[Ryan]

So someone posted annonymously on a twitter acount that a teacher (no names were mentioned) had sex with a student a really long time ago. The twitter page would receive this sort of annoymous messages which then they would post on the account. It was a pretty good system. The thing is this is an acussation that could be or could not be true. What would happen to the student if the authorities found out who posted it. Like they did it without knowing for certain that was a fact? what happens to the student? how much trouble is that person in? im really curious about this, no one has been able to give me a good answer! hope you can!