Let me give you an analogy to explain in better terms what dbphoenix is trying to say.
It's like three guys standing in a bar talking about football and then another one comes up and says, "Football is such a ridiculous sport. It's dangerous and stupid. That's my opinion."
Then one of the three guys replies, "Yeah, not everybody is into football." And then he goes back to conversing with his friends about last week's game. Within a few seconds, the guy that doesn't like football repeats his sentence, "Football is such a ridiculous sport. It's dangerous and stupid. I have no idea why you guys are even wasting your time talking about it."
Then another one of the three guys says, "Yeah, we got it the first time. Would you mind backing off?" But the guy that doesn't like football just won't shut up, and in fact keeps repeating himself over and over to the point that it's impossible for the 3 buddies to have a normal conversation about something they're really interested in without being interrupted. So what happens next?
The football hater gets his ass knocked out for being a fucking disruptive idiot. Now that's the way it works in the real world, and the way it should work. Unfortunately in the online world we don't have a knockout punch available, so we must do the next best thing which is allow people in a like minded conversation to be able to completely block out trolls who's sole purpose is to disagree with the entire premise of the conversation.