No, it is not acceptable in my view. I don't want to RO a girl if she is on and I don't want blood on bedding, clothes etc., either. I am not squeamish at all, I just don't want the mess for a start. I would complain bitterly at the cinema if half way through the film it broke down and I couldn't enjoy the second half - the same thing goes for a WG. I had one girl try it on a few years back. She accepted a 2 hour booking knowing that she was on but I wasn't having any of that - at the top of her bag was a box of tampons!