I'm of the belief that you treat any batsman or bowler with respect, because sooner or later you'll come a cropper if you start to disrespect the opposition.
In our division we've faced two teams with a girl on their team, and both were ok cricketers. But the problem you sometimes see in attitude towards playing against (or with) girls, is the same attitude you see towards young kids and old guys that come on to bowl or go out to bat. I've seen it all too often when batsman's eyes light up when a young spinner/seam bowler comes on, or an older guy - only for them to get caught, bowled or stumped.
I'll give another example. There's a guy who is about 50 who plays for Torrisholme in the palace shield. If you'd never have faced him before, you wouldn't think much of him walking out to the crease. However, he scored 20,000 runs in league and cup games in Northern League (teams have pros), and played a significant amount games for Cumberland in the minor counties. So he's a damn good cricketer. But I heard a few comments from unaware teammates when he came out to bat. He soon shut them up.
So whether I face a woman or a guy, I'd treat them with respect because the game of cricket is about having the ability to hit a ball with a bat, or as a bowler get a batsman out. It's not like in rugby where you need to take down 6ft 4, 18 stone guys. In cricket it's about ability and hand eye coordination, and I've seen women that can bat (and bowl) just as well as men in amateur cricket.