Go with a group, you'll come across recruitment threads on this forum. That's how I found one and rolled with my first BC and it turned out great.
Staff members are stationed all over the convention area and are generally friendly. So if you need anything feel free to talk to them.
They've also introduced a color badge system for you to nonverbally communicate to others whether you're open to chit-chats or not.
Incidents like the one with Toon are generally rare, hence the massive amount of attention given to them when they occur. As long as you follow common sense (Be clear with your message and don't accept unwanted advances, etc) you're most likely gonna be fine. Of course, BC staff are around to help you.