f you can keep calm and and keep a sense of humour about it you can have some fun. I had a positive experience in Edinburgh a while ago I shared on another thread where I am sure I really made a JW guy think seriously about things. Even after he worked out I was DFd he shook hands and we left as friends. Those are the best ones.
Yea, the neutral territory of public space means the pronouncement to "get off my property" or conversely "We'll be going now" do not apply. JWs literally have to run away and leave the cart, or sit there and take the abuse because they asked for it.