posting emails is dangerous because bots will traverse forums looking for "@" and ".com/.org" etc symbols to pick out email addresses and add them to lists for sending spam.
posting your full name, and ESPECIALLY with address and all that is extremely dangerous, with some very possible serious consequences. Stolen identity? Very difficult thing to recover from.
I think having both the buyer and seller put forth the effort to communicate with each other is the best way to go about things. I'm perfectly able to keep myself safe from scammers, and I don't need them to post their email or full name in public. I like the way craigslist does it with the annonomized email addresses, gives enough protection to the sellers without limiting communication to the buyers.