What does the fact that it’s public have to do with anything? It’s just basic netiquette. For example, I don’t care about My Little Pony, so you will never see me going into [email protected], or whatever, and saying something like, “My Little Pony sucks… See ya, guys!”
Lol, yes, I realize I am showing my age and that is a very old term that isn’t widely used anymore, but it doesn’t detract from the point I was making. Just because it’s very common to be rude online doesn’t mean we shouldn’t at least attempt to be less so.