I think that they should be allowed to play. Everyone has the right to do it. Let them play. But on the other (and more realistic side) it wouldn't be wise. Men are naturally more stronger and agile, (not necessarily faster). It would be really bad if some guy would tackle a woman from behind and she would get injured. It probably would be a media story. And some men wouldn't be concentrated on the game but on something else.
But as I said: if they have a wish, let them play. In the end, they must be prepared to suffer any conequences or injuries. (If any are inflicted during the match)
Something else has come to mind: what would happen if they are to go showering together after the match?
