Hopefully we can widen this out later but this is principally in response to Sam Stone’s comments in this thread.
Actually according to this, this, and this he deliberately flunked his entrance exam in order to pursue an acting career. This is not to say that the man is a Nobel Scholar but it does suggest he’s not the imbecile you suggest.
While Sheen may well have had problems with alcohol and drugs in the past I’m fairly sure he’s been clean for a long time. I would certainly be very wary of judging a man’s political opinions on those grounds.
I would also suggest that acting is a profession of considerable merit and that it involves considerably more than pretending to be other people. Martin Sheen is generally regarded as a rather fine actor much better than say, Ronald Reagan. Just out of curiosity did you base your opinion of his views on his previous career?
The culture we live in places an unhealthy emphasis on the famous I think you would agree. As a result the views of someone like Sheen will be heard by many more people than those of you or I. Why should this stop him campaigning for what he believes just because more people will hear him? If Sheen was a Plumber would it be wrong of him to attend Anti-war marches? If not why is it wrong to do so in his current occupation and why is it wrong for him to take advantage of the benefits of his Profession?