I don't disguise it but I don't advertise it either. Net result is "mostly" stealth, but not trying to make it that way. It just happens.
Now the joke about the hat? It's funny stated that way, but my eldest son, who has turned into transphobic bigot #1 in my life, said if he had his way, every single trans person would have to identify themselves as trans to every single other human being with whom they interact solely so that other human being could choose to discriminate against them if they so wished.
Yes, he actually said this. 😛 Needless to say, we don't get along too well anymore.