Even though I don't watch the show, I've often wondered how Jon Cryer et. al. feel every time they hear that without Charlie, there is no show. It's called Two and a Half Men, right? Not Charlie Sheen and a Bunch of People He Carries.
And while I admittedly don't watch the show, I've seen Holland Taylor and Conchetta Ferrell's other work, and I know they are talented. Also, wasn't Jon Cryer nominated for an Emmy for his work on the show? Somebody must have noticed him creeping out from behind Charlie Sheen's shadow too.
Charlie has clearly completely jumped the tracks, and I feel bad for his family that they have to stand there watching it. Short of having him committed, they really can't stop him if he doesn't want to be stopped. I heard someone asking Dr. Drew about the situation. I have no idea whether Dr. Drew has had any direct contact with Charlie or not, but he seemed to be implying there might be something else at work here, such as manic-depression. I don't know if that's an accurate description or not, but he does sometimes seem very manic.