It's unfortunate that it happened. But it happens every day, and just because this guy was an actor it does not mean (in my opinion) that it was any worse than any other case of someone overdosing. Or that because he was an actor that the drug dealers are somehow MORE responsible in this case.
I do not do drugs, so I understand that I just "don't understand addiction." But like everyone else in this world, my entire life has been flooded with anti-drug messages. Here's one that comes to mind: Winners Don't Do Drugs. All in all, it comes down to a choice. Some people make that choice and live with it, and others...
I have lived through hardship without resorting to substance abuse. I don't know why I should hold anyone to a lesser standard.