Due to the number of spammers hitting AMI I have changed the method of registering in the froum to require Admin approval. In the last 3 days we have had over 100 spammers try to register and another approx 25 of them suceeded, in fact within 5 minutes of changing the proccess I had a spammer apply.
I will be checking the system regulalry so hopefully I won't have too much of a lag between applicatioon and approval.