To be fair I've been too and enjoyed it when I went. Only a fiver tax, a decent venue and some great DJs (have to exclude the above DS, who was not great). I'd be saddened if it were 'J.J' who had done this. The last one was a packer and really decent, so he's in little danger of being undermined... this would make me think twice though about next time.
We've had an issue in the past with a local North Wales promoter (not the folks at the lovely Broughton Wings Soul Club, they are top, top drawer), turned up at one of our charity nights shouting and balling about music policy etc before leaving noisily. Its a bit of fun we put on for our mates to spin a few tunes, have a dance and a catch up, and to raise a few bob for others. No one is doing it to attack your 'margins'.
Leaves a bitter taste but I imagine its a years old problem.