Just recently, I have had pm notification emails from some of the forums I visit (none from here..yet) all of which link over to porn sites of one type or another.

All of the forums are respectable proper forums, so be careful with any PM notifications you get.

Andy,

Any of them using vbulletin; that is the same software as we have?

PM a few links to the sites if you want I'll check it out.

This is the last site I got them from..

http://forums.comodo.com/

(Its the support forum for Comodo security products, including the free excellent firewall they do.)

I don't think they use vbulletin, but it looks like signups then flood pm-ing people.