Being the slightly more paranoid mindset, too easy to post links by griefers, that lead to trojans, and worse for us, keyloggers. Maybe a timed basis of being an active participant, is my thought. Hell if someone is going to waste 3-6 months on screwing us over... This way is one hopeful idea to limit those who might be cruising for easy prey. After some agreed upon time, they can post direct ads or links to craigslist/ebay. The original system of a handshake aka referrals by known people still works, too