I think this is a great idea in principal but, let me pose a scenario..
I'm looking for a difficult part, maybe a 7206 Rivet Bracelet or some tropical Crystal, so I post a WTB with no email info.
A member with the item then needs to respond to the ad and post underneath the WTB.
For example: Hi, I have the 7206 you are looking for. I want $900 for it, email me to discuss further.
Now, what if some other VRF member sees the WTB, sees the response and contacts the seller saying "hey, I need that part too"
Is it not possible that because the seller has now disclosed his email, his price and the fact that he has the item for sale
that someone else can come in and scoop it up from underneath the original posters nose?
In essence, all WTB ads will now become For Sale ads because they will need to be responded to in order to be filled.