It's personal choice - only time they bug me is when they come knocking, but tbh apart from one a loooooooong time ago, they don't push it and are better than the twat in London with the megaphone.
Learnt quite a lot about JW's many years ago due to so close friends being them...even went along to their big conference thing (dull as btw...)
Went on holiday with the lad, he had the no blood transfusions card in his wallet - I informed him that if anything happened whilst we were away, and he needed one and was unconcious, I was stealing the card and it WOULD happen...I believe my words were "Let YOUR God punish me for making the mistake then".