the thing about being in a public space is that you are in a public space.
one of the advantages of online public spaces is that you can usually block and/or silence people, which is a physical impossibility in non-online spaces. that's pretty neat! but it doesn't get around the fact that you are in a public space. people will do things that you often do not like in a public space.
cohost is a public space. you should act, react, and protect yourself accordingly. this is not "a community" and I sure as hell hope you, reader, never think it is