I agree about the urban legend bit, but there are a couple of things I do. I'm only dealing in machining stuff, so I get if you're selling phones or tire its different ball game
First, as a buyer, I would never ever go and meet someone somewhere. Its the buy side imo that is exposed as thats where the cash is. I'm not walking into an anonymous meeting with a pocket full of cash. THAT is stupid. I am not worried walking into someone house, who has machinists stuff for sale....people with unsavory intentions don't give out their home address - unless its some trashing address in the worst part of town. in which case i don't go. Once, out of a lot of purchases, a seller was nervous and I assuaged by giving a 'real' work email. They emailed me to confirm at what was clearly a corporate url, i'm not longer anonymous, problem solved. Still think it was irrational paranoia on their part ....as a seller, what are they giving up with a address? The phone book is full of them....I could walk up to any house and mug them, they don't have to have a lathe for sale.
On the sell side, I'm also not meeting - I don't have time to drive especially given the no shows. You come to my house, BUT, I apply some filters. If you do not exhibit basic courtesies, you're not coming to my house. Rude, no please and thank you etc, sorry, no response. Its far from perfect, but I think there is less likelihood of someone brought up properly to have the required lack of values needed to go around conking people on the head. Secondly, I always say "please confirm a time and give me your phone number and I'll get you directions. They never get the address with given the phone number. I'll often call. It takes away the anonymity. No one is going to come with ill intent if they can be identified. That little step also stops 9/10 no show flakes.
Even if the guy gives me a "burner" number, whats he got? Oh a guy lives here, and he has a $25 micrometer? who cares, whats the end game to make worthwhile? doesn't make sense.
Last point, anyone understand why craiglist and kijiji started masking the emails awhile ago? Seems incredible stupid....increasing anonymity increases the chance of a problem imo.