JW_Rogue
No, that is not complete nonsense, and yes, it has happened - several times, to me! (And it's not always necessarily a good thing).
For the sake of brevity, let me give you just one example. I had already left "the Truth" many years before. I started a new job. I had one manager in particular who was a real hot-head, angry, belligerent, foul mouthed, no body really liked him. He was a clean cut guy, well dressed, but what an arrogant ass hole!
One night I went to the Cracker Barrel to eat and as I was leaving, I saw him dining at one of the tables with two women. I assumed that one of the ladies was his wife and the other may have been his mother or mother-in-law. But just looking at them I just knew "My God! He's a JW!!!"
I can't explain it. I just knew. I did acknowledge him and said hello. I decided I would ask him point blank the next day at work if he was a JW.
After sleeping on it, I chickened out. If I asked him that and he wasn't, that would really piss him off, and he could really make my job more difficult. So I just let it drop.
About a year later I was talking to a co-worker and the subject of religion came up. He mentioned to me that there were several JW's who worked there. I asked him who, and guess who the first one he told me was???
After about another year this particular JW was fired. He was making racist comments to other employees there.
So, yes they do indeed stand out. And it's not always for the reasons they think!