I may upset some of you, but I have three daughters and when they were in high school we got tp ed about every three to four week. We have big trees, lots of bushes. This is a pain the tp'ers would step on our lighting outside, break them trample flower beds, I found out that tp'ing is a a crime according to our local police department it is a trespassing and most of the time the tp'ers are also are breaking curfew. I did not enjoy picking up tp every time and trying to get it out of the trees. No I did not call the police! But, I don't consider it harmless, when you are on the receiving end and I did not allow my daughters to be a part of this
I taught them to respect other peoples property. This is my take on this activity
being on the receiving end.