For what it's worth, I check out every new member to see if they fit the spammer profile. If they do, you usually won't see a post from them. If their posts are allowed to remain, you can be reasonably sure that they are not a spammer. For all others, I would suggest that a welcome is more appropriate than perverse solicitations.
Then I'll get on my knees and pray,
We won't get fooled again; Don't get fooled again