Following up on Medusa's example, time and time again I have seen people online state that when they are not sure what pronoun to use they use the male pronoun to make sure they don't offend anyone. It is considered safer- less offensive. I have read this multiple times over the years and some from very well meaning people that I really liked and respected.
It is not the honest mistake that is the problem. Male is clearly valued over female out in the world- our butch femme online communities have been no different.
I welcome the fresh start here on this website.