Yeah I've done it. I've never outright lied to them. I appraoched a few sitting at a table at a McDonalds on a saturday morning. They had their magazines prominantly displayed on their table, and they were posisioned to where you had to walk past them so you could order.
I got my food and walked up to them "Jehovah's Witnesses, eh?" Struck up a conversation. I told them I used to study and was very familiar with their teachings. They asked why I stopped and I told them because there were huge holes in their doctrines that they couldn't explain. I brought up 586/87 and they looked at me like I had just grown a second head. They told me that there are certain things that I just need to take on faith.
I gave them my name and email, I said I'd like to talk some more, but it's been months and they never followed up on me. I guess I was undeserving.