Teehee! My feathers are far from ruffled - I'm just disagreeing with your point
I've always preferred going to family-friendly events - partly because it means my friends with children can go - partly because the "adult" behaviour doesn't kick in til the kids are all tucked up in bed or at least away from the bar area - partly because I prefer a mixed crowd.
If I and people like me, stay away from family friendly events because of unacceptable behaviour by certain parents at them, this behaviour soon becomes "acceptable" and the "norm". I don't think it's unreasonable to demand that parents take responsibility for the supervision and control of their own children and their safety.
On a very small scale event where everybody knows & trusts everybody else, I accept that it can be a totally different situation. But on a fairly large scale event (approx 3,000 people) it's really too risky to allow your kids free rein like that.