That's stupid for just gluing trays together . Maybe a detention or something but I think even suspention is too much for doing something little like that. I know at my school you would probly just get told off by the teacher. But the same thing happened to one of my friends last year for a prank he did.
As for the swearing, I think it's stupid to get suspended for that to at least at my school it would be because the teachers swear at us too, so honestly what do they expect when they give the kids no respect and are setting that example.

He cannot expect a teen to keep his voice under control when he as an adult cannot do the same.
Wow I wish my mother would understand this..