Sure, if a guy walks up to a chick and sticks his hand down her pants, that's one thing, because he's clearly out of control. But the example given in the OP was something like "Would you like to have a drink?" I don't think I would be inclined to come charging to the rescue if I saw that. I don't like that women have to deal with unwelcome advances, but I wouldn't feel right rejecting him for her.