I have been married nearly 14 years...My husband has always worked in situations where it was dangerous to wear a ring...wear a ring vs. losing a finger.
Since have my kids my fingers have grown (not the only parts of me LOL), and I can't wear mine.
I really don't think about it. I am confident in my marriage and we are just not jealous people. As far as meeting anyone.. I never look be it man or woman. Not sure if it is because I am not in the "market" or it is just not one of those things I look for. I generally look at someone's eyes when I talk to them, so I don't notice hands.
I guess if it is someone I just met on the street then I would have to ask if they are married, and why would I care. In a work environment, most likely I would already know they are married and wouldn't think to check for a ring.
If someone is up to no good, ring or not, it isn't going to matter.That goes for the hubby not wearing it or the person checking out for one. Rings can come on and off too. If he isn't wearing it around you, I wouldn't worry about it. If you pick about something like this, you make yourself crazy and generally push the person you love away.
I got the funniest joke in email the other day... The husband came home drunk from being out with the boys, woke up the next morning not remembering anything to a clean house, note from the wife, breakfast cooked for him, etc,when he really figured he would be in the dog house. He asked his son what was up... and his son said, you came home threw up everywhere, mom had to clean you up, it was yuck...and the man said, well why is she being so nice... the son said, well when mom tried to undress you, you fought her telling her to leave you alone you were married! LOL
Point of story, she was happy that even smashed he knew he was married. You are married in your heart, the ring isn't going to keep you honest...it is what is in your heart...