There's a report spam thread. Report them there.
Delete these forums!

I just posted 'Delete'
You don't need to do all that work. Mods see who the spammers are and mute them one by one--making all their posts go away at once--until they're all gone. The spammers won't listen to you.

Report spam here. Creating a post about spamming doesnt get rid of the spam.

I just posted 'Delete'
Please do NOT do that. I almost closed your account by mistake after seeing it in one of the recent spam threads.
These threads are not likely to survive for very long, because many moderators are aware of the problem. If they remain undeleted for more than a couple minutes, report the spam in the link that GodsPawn2016 provided; here it is again:
Report Spam here! Spam Only! Not abuse, not cheating, Spam Only!
and it will alert any moderator who is tracking that thread to take care of the problem.

Actually, there's no bad forums. There are some bad threads. Also, its more effective when you use a picture.
Mr Erik, Tear down these threads.
Also, its important to use the correct picture. I teach a course in "picture selection" at Chess.com University
For instance, THIS would not be the proper picture for that statement.
Mr Erik, TEAR down these threads.
Delete the bad forums!