I feel your pain, Mr. Rain Man. I'm selling stuff on Craigslist and it is beyond ridiculous how some people act like it's no big deal if they don't show. Those assholes seem to not understand that you're selling stuff for a reason and have a busy lifestyle that must be put on hold just to meet up w/ them. Then, when they don't show, you miss out on selling to someone that will show.
Anyway, good luck finding a tenant and watch out for those nasty spammers!