A convention space, while a public space, has convention rules. These rules came out of necessity over the past 25 years of nycc and were not always there.

If you pan over a crowd, no one is going to ban you. These rules are there for specific people who make the space feel unsafe and it feels like a lot of them showed up in this thread angry.

If the space doesn't make it feel safe for cosplayers, cosplayers won't show up.