and it wasn't something random....if it happened at all.
Right. And I'd just add that the alleged event to which you refer wasn't even at the convention at all -- it was in a bar 3 blocks away.
The Convention is safe. There are security and police on site. I've literally never seen a problem in 33 years. I brought my teenagers this year and they went around the convention by themselves. Like most people, the most dangerous thing they were exposed to was the car ride to and from the event.