I keep expecting to be blocked, but not yet.
Guess I'm not as annoying as I thought.
I only block spam or if I tell you I'm not interested and you wont go away.
I see it the same as finding someone you disagree with at work, easier to just avoid the subject you disagree on because neither of you is going to convince the other they are wrong, so why chase the guy all day arguing with him?
So yes, the blocking feature is abused.