Sheen is a genius when it comes to acting, and being a famous person.
I can't say I blame him for capitalizing on the media attention, and in his own way, trolling the media. Seriously. The media nowadays needs trolling...and Sheen delivers.
Sure Sheen screwed up royally. We all do, we're all human. He was well within his right to give the proverbial finger to society...because if he hadn't been famous, nobody would have really given two figs about his problems, and the news agencies certainly wouldn't have made it a headline! :/
So yeah. Sheen knew he was royally hosed when everything went public, so he intelligently capitalized on media attention, because he knew how uptight the network was.
I don't condone what he is doing, I think he's setting a terrible example though. I do commend that he made lemonade from those lemons. :p