Well, is a joke when you do it to other people. Its not a joke when they do it to you.
Now seriously, it all comes to culture. I always get surprised by what people in USA think it is a "prank". Some jokes that friends do to others would end here in a fist fight an end the friendship, yet they tolerate it. But also some things that would end in court in USA and Europe, here in South America would be solved beetween the people involved.
From a moral point of view, and acording to my particular place in my country and group of people, i find all thoose things just problems beetween young people, who should mostly be tolerated, as long as its not abusive against someone who cant stand for himself.
Edited: Maybe they cross a line trashing each others houses.