Okay, should I be concerned about this?
Now, I do know everyone as their own opinion, so should I care if some people prefer to roleplay as characters of their own gender?
Nope. Nor should people care if others prefer to roleplay as a character not their own gender.
Honestly, it's a game, for crape's sake.
And just as stated before, saying that people should only play characters their own gender is like saying people should only play as actual people.
Wait, what?
Now then, I don't care if someone prefers to play characters their own gender, what gets on my mind is when people don't respect other peoples' opinions and choices, and thus kick them out of the group because theirs aren't the same. That's total discrimination right there. :/
And don't get me started on that conversation, either.