Hahaha, many years ago I went to a MarCon in Columbus that had been scheduled alongside a high school prom. Not necessarily a problem, but there are always people in costume at these things, and there happened to be a dominatrix leading two gimps on leashes through the main concourse at the same time that the kids were parading through...
Many Cons have had to establish boundary rules for that sort of "play" regardless of if they are scheduled alongside a more "normal" event. Also, BDSM culture itself has fought hard to move towards a more consent-based culture and publicly displaying such things without public consent is increasingly considered rude.
