Trademark and copyright law only goes so far, though. This is stretching both. That's what's wrong. By the way, in some states, it's legal to carry even where

Trademark and copyright law only goes so far, though. This is stretching both. That's what's wrong. By the way, in some states, it's legal to carry even where private actors forbid it, so you could attend a conference where they are "forbidden", and there could be people legally carrying anyway. People will never know.