How to report spam:

Go down to the very bottom of the page where it says "Contact us". Click on that, drop down menu to "abuse or violation", then "spam" as subject.

In body of message, copy/paste thread url and also the url of the poster's member page. Comments optional.

You can also add to the thread "spam reported" and then 15 of us don't report it. Remember that the Powers That Be here also have evenings and weekends off, so sometimes spam isn't removed instantly.

Here's an example:

http://ths.gardenweb.com/forums/load/realestate/msg101944486569.html?1

from mlsrealtyx just registered today from Canada

http://www.gardenweb.com/auth/nph-logincheck.cgi?action=public_profile&user=mlsrealtyx