Its easy to mock the likes of Lohan, but she is an easy target.
Lets face it, up til a few years ago people mocked Downey Jr for similar issues, and now everyone is clamoring to heap praise upon him, showing how fickle the media and public is.
Also, look at Drew Barrymore, who went through a stage very similar to this, and she also turned herself around when she grew up.
Its just not interesting or entertaining anymore.