They could probably filter out certain phrases used by common Internet predators, like - "I'd like to get to know you...".   Right now, it's easy for anyone to come to HA and sign up as a Community Member.  But, just blocking that person's email address is probably not going to stop that person from using different emails to send messages.

The insecurities [Internet] is making it quite a challenge to keep our personal information private, so we do not get intrusive messages, while we rely on the Internet for business.  We need to reveal who we are  to solicit 'trust' with prospects (during the inquiry stage) and  we have requirements set forth by government entities to include personal details on our websites.  It's a balancing act....and it's not easy these days.  More and more legislation is being  imposed on us, while we feel less and less protected from all types of intrusions --- online and offline.

It would be wonderful if we could feel safe signing up for a community of online members...that is truley 'private'.