At least for myself, when I post here I *ASSUME* that I will get replies. It's sort of the point really.
Especially since the platform emphasizes "followers" not "friends" I don't look for people I already knew in real life (like Facebook).
This said, there is some social etiquette. I always hope I won't be piled on by haters. I try to be polite. I am hesitant to enter conversations with a majority of very different people discussing a topic I know little about.