I guess I got my first experience of shunning last night. Keep in mind, I'm not even DF or DA (yet). I walked into WalMart and happened to see a couple JW's walking towards the exit. So I walked up to them and said "Hey, how's it going?" And they just walked past. I know they saw me and heard me. I'm not even DF or DA so I don't even understand why they would shun me.
So that was my first experience with shunning. Let it be known that while I was a dub, if I saw a DF person I wouldn't ignore them. I'd at least say hi back. I never agreed with shunning.