well I've definitely told some ppl to f*** off before, but usually it's very discreet and because one particular person has been a complete and utter ass hole for the whole of my set and really affected the way i'm playing.
I also remember how bad it was at the front that night and it was very, very frustrating for me to mix. It was very, very hard to cue records up when they kept being knocked all the time. You had to be very fast!!!!!
Add up what was going on that night at the front and the hassle and frustration you can imagine the DJ was feeling, and you can see why suddenly a DJ might go 'F*** OFF!!!!!!!'?????????????????????????
I dunno, there has to be a better explaination that just telling his crowd to '**** off'.