We think this issue can be resolved if WA can develop a feature like this:
Instead of showing the email address, we can choose to show "Contact this member" link, when people click the link, it will show up a contact form for them to fill out and the message will be forwarded to the member's email. That way we can protect member's privacy, also we can keep track of the lead sent to the member from our site.
This feature is currently list in Road map forum too. please visit the following thread and Vote for it !!! ... so that WA will develop it sooner!!!!!
http://www.wildapricot.com/forums/thread/6872.aspx