Well, I think it's hard to know sometimes. I do things which would not seem very INFJ at all. And yeah, calling someone out on it probably causes a lot of dislikeness. I am pretty "hated" too, ha.
I'm sure some really are just admirers and like the idea of being the rarest type.
Yeah, I went on tinychat once. First off, I was pretty effin scared. Group interaction -- gaaah! At that point I thought they were all INFJs and that I was being weird. Turns out, none of them were. I can't see many INFJs enjoying tinychat unless they really know the people in it.
I had a look at infj.com. Didn't seem like much was on there? But maybe it all unveils itself once you become a member.