just to let you know guys
phpbb has a very simple fix for spam, my site
www.prmc.co.uk was getting around 15 new users day and we'd only just started it., (only posting the link so you can see it on the reg page, if you want me to take it off just say the word. I hate spammers more than anyone)
There is a very simple mod to prevent it, I haven't had one more spambot to this date after nearly a month.
Some instructions on phpbb, I've you want it pm me and I'll get you the link. Basically on the registration page it asks a simple question (you make your own up)
like "what word would you get if you put the letter C in front of ODE"
it keeps 100% of the spammers out, it's called "VIP Code"
apart from that phpbb is bang on, it genuinely puts a full stop to it. 5 mins to install it and that was for me, a complete amateur with coding.
Obviously won't stop the manual spammers but will stop spambots which do around 99% of phpbb spamming.