Need Help with Freeform Spam Filter

I’m not sure if this is the appropriate place to place this questions since I don’t think it’s an EE product, but I posted my question on the solspace forum and didn’t get a response. I have a client who is getting tons of porn url spams in his form email/database. If there’s a better way to eliminate this I’m open to suggestions

Here’s what’s happening: If I enter nothing in the blacklist area, my form works correctly, but when I add any keyword the form is always rejected. I’m trying to recect anything that looks like a link, so I’ve tried keywords like html, and www I’m also running an older version of EE 1.5.2, could that be the problem?

I looked at the code a little and it appears that the blacklisted keywords should be entered one per line and the code then parses the keywords by \n and \r into an array. If I’m wrong about the syntax of the keywords, please let me know. Maybe I’m just using the product incorrectly.