@forestcat
Its quite interesting that you write this about the scabies. I never even heard this being a problem or really being a thing.
I atleast had the image that the community was rather responsible with desease control. Though maybe thats a sample bias from my bubble?
Normal scabies should not be a problem really. scabies crustosa seems very different though
But if you have crustosa you should know really. And not be at congress at all. Though if its really a more widespread problem the orga should look into that more.
On the abusers

Why are there always people being shit to others in more niche. Cosplay/Anime Cons have that one as well.
But it should be easy right? You do stupid stuff you get booted for it. That would work for an ordinary visitor. But things get very messy when the structure itself is part of that. Like abuse is nothing you would really do as someone ordinary. You almost need a position of some power, so you could be an abuse dick. Or you are just a creep.
Normally moral and consequences should keep these incidents to a minimum. But if you don't have to fear anything surely it will happen. And then again.
I see how that could absolutely destroy the place you made your new home, sometimes even second family.
It would be very sad if that broke for someone because of systemic issues. Especially since chaos is mostly visited by people that are in some ways marginalized and not what society at large calls "normal"
Stay safe