i have no problem telling people. i've received support, and "wow, i can't believe someone's doing it successfully - good for you!" from nearly everyone. the only ones who i didn't get total support / encouragement from was my parents, who felt it was too risky to do something like that on my own.
even at the point that i wasn't making money, i still received lots of well wishing, etc. most people's followup question is if i work in the city...no, from home. then, what firm do you work for - no, my own money. then the "wow" part...
a couple friend of mine have thought about trading, and i throw out things, such as "ok, you've just had a bunch of down days, and lost X$ - can you handle that?" they only see the (perceived) easiness, and not the fact that it's very possible - and likely - to lose money on a day.
and if i'm trading conservatively, i'll often stop by noon. put THAT together with working from home, and some get gaga. but that's because my system works best in those hours, and part of my experience / history. it took a while to learn the seeming contradiction, that working LESS hours (in certain times) means better returns.