BP no spam here but Nick has tried to register twice and keeps getting locked out because the board software thinks he is a smapper. (you and I both know that he is!)
So, as far as new users who register and are told they are a spammer it's because they either are a spammer or picked a username, email address, or IP address previously used by a known forum spammer.
if you go to "settings" up at the top right of the forum
then "general settings" in the left column in a box "my settings"
from the general settings page there is a section called "vcard download"
this section says "You may choose to allow other users to download a vCard containing your email address and username -- If you want to keep your email address private, do not allow vCard downloads" there is a box to allow or not allow