Powerlevel as fuck, but I was at a con a few years ago and a random guy in the lobby was really bad looking. Head down on the desk, complaining he felt nauseous. One of his 'friends' kept insisting he goes back to his room with him but me and another chick who saw him and got concerned took him to the con staff room.
Con staff didnt' do shit. They were just like "Oh if he feels worse bring him back" - No giving him a drink, taking him somewhere safe, nothing.
Me and the other chick decided we'll escort him back to his room together and make sure we stayed with him for a while. Good thing we did because the guy began to cough up blood and got delirious as fuck. He suddenly remembered that a guy he was talking to put a straw in his drink and he had suspicions, but we couldn't find the dude anymore.
It was the dudes first con and he felt like shit afterwards. He said we were the highlight and let him at least know he had people who would look out for him but all three of us agreed the staff did a horrible job. It was only until he began getting bloody and slipping in and out of being barely conscious, that we pressed the staff to try and get him some decent medical help.
Turns out yeah, he got tested and was drugged and there were several different drugs.
It was a small local con with only about 50 members for the first couple of years and now that it's gotten big, with people travelling from all over the world to come, it's gotten more and more of a breeding ground for bad behaviour. It was the first time - that we know of - someone had been drugged there.