I just make comments, if they get ignored, I dont mind (or notice much to be honest). I never thought of there being cliques on here, but I suppose there probably is, as you said, it is pretty normal in society generally.
The difference here is that you can still comment, the forums are an open space. The comment may go un-remarked, but you can still have your input and it is there for all to read or ignore as they see fit.
I tend not to worry about it much, I enjoy my time here. If I didn't I'd go back to whatever it was that used to eat up my time... if only I could remember what that was.