all you can do is like every other section does, use the report button and wait for a staff member to get around to it. It is very common for popular forums to be the target of like spammers, I see it all the time. Their bots are very effective and bypass all but the most stringent of spam control. That type of spam control would not be welcome here as it would also likely affect visitors from countries that blacklist this site...like South Korea (to name one of many). This is just the price of doing business on the net.
It is possible that sometime in the future CoolZero will have an answer for this but atm, please be patient.
i've changed the captcha.
Hopefully this is now preventing a bit of the spammer-bots :/
i've already setup some banning-options, that will autmatically ban the threads, that have special words in it.
but he changes them every few month, so that this will get useless :/