If you notice a spam thread please click the 'Report to Moderator' button rather than reply to the message
A few times I've noticed a lengthy thread whereby members have replied to the the spam yet no one has reported it
The sooner you report the spam, the quicker we can delete the feckers! 
Cheers
Rhys
further to this,
as we are getting spammed a lot of late

once you have reported a thread
can you post REPORTED in it

to stop others reporting it.