For me the use of titles seems to be one of those online customs that cought traction in the real life arena. Prior to the internet about the only times I heard people refer to themselves with Mistress or Master in front of their name was if they were Pro Dommes or Pro Doms.

Also In the last few years I have seen, at munches and events, people switching from their internet "handle" to their real names. And lately they have been omitting Master, Mistress and slave etc..

HHHHMMMM....... everything old is new again?