Automation....hmmmm, I'm not sure how to directly go about automating a process like this. Nothing in phpbb actually "runs" as such to hook into.
Are any functions set to do something on a periodic basis without user input?
I'm not a php coder so just to make things simple can you show me how to call your script from within user registration? I'm thinking I'd like it at the end of the registration process, after submit and before the next page is drawn.
I want to see the spammers do some work for a change by cleaning up their own mess.