@mntmn That person is wrong in multiple ways. Not just being homophobic. I think he is also being sexist, assuming only men buy your device. Although, I am surprised with how the world is lately, that this is your first letter.
I don't support this gay bashing just to be clear. Its utterly pointless/useless in addition to being judgmental and moronic.
Don't let it bother you, nuts are everywhere.