Good idea not to do it then Gulliver for true or imagined will just as upsetting for that person. It will ruin his or her night and probably put a damper on the whole session if not end it abruptly.

I wont be offended if asked not to smoke but I will show my displeasure if someone messes with my Guitar without asking. The majority of people in this discussion are I think in agreement with it being an individual's choice to lend or not to lend.

I refreshed this thread Gulliver because someone came to me and complained that he or she (I am not going to say who) felt to frightened to say no. I think that if you think that it is ok to be intimidated into doing something that they do not want to. You have a serious problem and should seek advice before its too late and you loose all your friends.