JesterMagic - 12:55 am on Jul 31, 2013 (gmt 0)
I agree with Planet13. I have thousands of spammers backlinks that change every month. There is not much you can do about it and Google's disavow tool is pretty useless in dealing with this (or anything else but I won't start a rant now :-)
Check your logs you probably also have spammer bots visiting your page trying to login and post comments.