Are you and the 'mods' using a system of 'moderation' for new members?
I do that on my groups until the member has established a pattern of responsible posting.
I clicked on the website of one of the members who joined today and was directed to a site that is very definitely NOT "Family Friendly"!
I immediately sent you an email giving the member's name.
I did not readily see a manner in which the members can 'directly' contact the moderation team and I may have missed it.
GrayBeard