It's just they are advertising annoying stuff , thank god they are not porn bots. So the topic doesn't bug me, I won't report but if it is a spam post I don't like, I'll report it. Leave stuff that don't bother, and only report I don't like for spam posts. Good? Okay.
Most forums do have spammers , example Tecmo Koei Europe which the 80% of the userbase there are spammers.
It's probably something to do with the forum software. Or how the domain is and/or how old the forum is. Usually newer forums don't get attacked as much, but still do. I hate spam so much, I don't even know why it is here, it's damn impossible to stop it on the internet, so we just have to live with it I guess.
So I guess we just have to leave the registrations open because we could be keeping out members who want to post, damn spam bots ca ruin everything.