I love how everyone hates Roethlisberger now, even though he never got charged. Young, attractive girls that end up in the same place as a professional athlete will sometimes do whatever they can to get as much money as possible (see Lake Tahoe, and IMO, South Carolina). I don't think Ben is nearly the person these girls make him out to be.
That said, no he shouldn't be putting himself in those situations and there has to come a point where he grows up and realizes his career is bigger than going out and partying. He needs to adjust his priorities and grow up from these incidents.