I think most all of us--on some level--wish or fantasize about this, but for most of us it's just not practical. Especially those of us who only wear them for fun and don't have an underlying medical issue that requires us to wear them. Also having kids complicates this even further!
There are lots of people here who very much believe that one should keep one's kinks at home and to one's self. That's part of my "deal" with my wife--that I can wear my diapers whenever I want to when I'm around her, but it's nobody else's business.
I also don't think that my friends need to know about it, either--though in the past I have had one or two that knew, they were mostly fascinated by this as a kink and were curious about "Do you wet them? Do you poop them? What do you do while wearing them?" etc. One former male roommate even said "I don't care if you wear them around the apartment" but I never did. I'm straight, so was he, it just seemed too weird to do--like walking around in my jockey shorts or something.
Now I have, in the past, had some fun going out diapered, without going to a lot of trouble to hide my diapers, running errands and such and enjoying when some occasional woman will notice and have that look of amused disbelief--but these were all people that I'll never see again. That's not the same thing as having it be friends / family.
The only two other people whom I told were a former girlfriend and my wife (before I married her). The former girlfriend later "came out" as a lesbian. I've often thought that every lesbian in my home town has probably heard all about me and my diapers. LOL.
But, to each his/her own. If you want to tell people, have at it. Just think through all the possible consequences first.