In my opinion there is absolutely no shame or stigma attached to HT. Women have breast augmentation all of the time and seem to make no secret of it. You made the investment, took the time to go through the surgery, why not enjoy the results? Your surgery does not need to be a secret unless you decide to make it one. It is your choice. There is no shame in Propecia either. This is a personal medical choice that is no ones business but your own. Again, no one needs to know unless you tell them. Millions of people take drugs for different things every single day that you would never know about.
As far as reversing the transplant I am unsure if that is even possible without removing the follicle? A very painful experience IMHO.