I don't understand what is so hard about blocking these posts. Surely the administrator of this forum must have the means to block posts that have a certain phrase in them? If so, all they'd have to do is pick a unique phrase from that post, something that is extremely unlikely to be posted in an innocent non-spam context, and the spam scum would be frantically trying to work out exactly which 3 words of their massive spam post were causing the block.. If I were them, I'd just give up.