Not only that but lots of people use KMA and so spammers like to target us as they think all of those people will see the links.
I know I've said it before but my experience of running a forum led me to create a separate user group for new members which preventing them from being able to post links and start new threads. When I had seen them make a good post or two I (or another of my admin) changed them in to the standard member user group. Thing was my forum was a lot smaller without so many new members signing up each day as we have here.
“I learned that courage was not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear.” ― Nelson Mandela