I have a sence of humour-honest!
Looking at some posts on this topic though,some wind ups are just not on.
If someone takes the time to answer sereiously to a question,only for it to be revealed as a wind up,it can make that person feel stupid.
I understand about 'mates' joking with each other but bystanders can get involved.
Sorry about the moan-blame the half term hols stressing me :-{