For the most part, we only know each other from this forum. On this forum we write about our crossdressing but many of us live normal male lives the majority of the time. Also, this forum attracts members and posters from all over the world. What you read here is a tiny fraction of the world's population.
There are some people here who seem to have crossed over into never-never land, but again, it's the Internet and again, it's a very small fraction of the population.
As for using a female name, it would seem pretty silly to be walking around in boobs and a skirt as "George" or "Bruce". When I get dressed up, I am "Krisi". Just like the boobs and wig, it's part of the presentation.