I suspect if CBC is allowing anyone worldwide to see the ISIS flag, Bitcointalk won't get in any trouble for doing the same.

Do you really want this board to be known as terrorist sympathizers?
I never mentioned that at all in my post. I was discussing coins101's idea that since the ISIS flag is illegal in a few countries, then it should be blocked when accessing Bitcointalk from these few countries as well. I was trying to explain to him that that's not how things work on the internet.