I also posted the link on my FB page and will be completing the volunteer questionaire in the next day or so.
The Quiet One, I have spoken to countless ex and exiting jws by phone. I warn them that I have caller ID and to block their numbers. Most of them haven't done so. And if they don't want me to keep their numbers, I delete them from the caller ID.
Here is an article on how callers can block their numbers when calling toll free numbers. http://www.ehow.com/how_8088596_block-number-calling-toll.html