Those are called allegations. Just because he is being sued doesn't mean Don Lemon did those things. There are some serious holes in the story, and it sort of has the tinge of homophobic slander. Now, yes, it is possible Lemon did what he is accused of, but we'll see what a jury thinks at some point.
Going back to Jesse Waters, that sort of behaviour is creepy as fuck — and the idiot admitted it on live television. I wonder what his wife now thinks about him. Was it illegal? I'd say he damaged (not permanently) the woman's car. Now, would they have hooked up at some point regardless of this sketchy move? Maybe. I mean, Waters was also married at the time (which raises the cringe factor).