If you get spam with a URL beginning with these domain names:
You can send to abuse@ that address and they'll kill it.
BUT - what if you want to actually find out who's behind the spam? In most cases, these sites are blocked by adultcheck.com or atsbank.com. At that point, all you can do is kill the site by sending a complaint to the abuse address above. There are, however, some clues that will lead you to the actual spammer. Here's how:
Go to the site. There's probably a few extra pages to go through (it'll usually say "enter here" or something like that, just follow their lead). Eventually, you get to a point where CLICK HERE TO JOIN shows up. That's what you're looking for. Click it. Some times, it'll take you to the site itself, other times it'll take you to a page with a form you have to fill out.
If it takes you to the actual site, it might just show up as an IP address. Take that to the traceroute page and see where it leads. This will kill several birds with one stone, especially if it's a numerical, "cloaked" IP address. It will 1) show a domain name, if any, 2) show the actual IP address, which you can take to ARIN, 3) show you who the upstream provider is, in most cases.
If it has a form to fill out, rightclick on your mouse button anywhere on the page. In the pop-up menu, click VIEW SOURCE. You might see something like this:
"http://3509609733/cgi-win/signup.exe"
Take that numerical IP address to the traceroute site, and give it a minute or so. In this case, this is what I got:
3509609733 traceroute to 3509609733 (209.48.101.5), 30 hops max, 40 byte packets 1 portland10.structured.net (206.58.0.10) 2 ms 1 ms 1 ms 2 pdx12-hssi3-0.or.nw.verio.net (206.163.3.53) 1 ms 1 ms 1 ms 3 fe4-0-0.pdx0.verio.net (205.238.52.201) 2 ms 2 ms 2 ms 4 pdx0.smf1.verio.net (129.250.3.21) 15 ms 14 ms 14 ms 5 smf1.smf0.verio.net (129.250.3.17) 15 ms 15 ms 15 ms 6 smf0.pao5.verio.net (129.250.3.13) 18 ms 18 ms 18 ms 7 pao5.pao1.verio.net (129.250.3.1) 20 ms 20 ms 20 ms 8 sjc3-core1-f5-1-0.atlas.digex.net (165.117.52.237) 20 ms 20 ms 20 ms 9 sjc3-core3-fa0-0-0.atlas.digex.net (165.117.58.227) 21 ms 19 ms 19 ms 10 sjc1-core1-s4-0-0.atlas.digex.net (165.117.50.121) 21 ms 27 ms 29 ms 11 ord1-core2-s4-0-0.atlas.digex.net (165.117.56.149) 93 ms 91 ms 89 ms 12 ord1-cpe1-fa2-0.atlas.digex.net (165.117.55.83) 89 ms 90 ms 96 ms 13 209.49.223.218 (209.49.223.218) 212 ms 100 ms 100 ms 14 reg.videofantasy.com (209.48.101.5) 98 ms 97 ms 94 msSo, in this case, the spammer is videofantasy, their IP address is actually 209.48.101.5, and their upstream is Digex.net.
It's a pain, sometimes, and time consuming, but once in a while, it pays to dig deeper into spam to find out who's behind it.
Note that this was just ONE spammer. There are others. My recommendation would be to test this out a bit, and post your results to news.admin.net-abuse.email, and ask for confirmation of your results. The people there are all experts on spammers, and will be more than happy to point out an error or confirm a result. They want you to learn how to help pin these guys down and pin them down hard. They'll also confirm to you whether or not the place you should send your complaints wears a white hat or not. In the above case, it would be useless to complain to the owner of videofantasy.com, he'll just tell you to "just delete it." You would have to complain to their upstream provider, in this case, Digex.
Hope this helps you fight chat room spammers. They rely on the cloak of invisibility. This will help rip that cloak away.