Guys, we can go back and forth forever over whether we'll ever see China crack down on this kind of stuff. My personal opinion is that China is not a country that decides these things. Rather, they are a group of strongmen who decide these things, and they'll go after anyone whenever it's in their interests to do so. In the past, the ruling party got financial kickbacks from all these types of people, so they were free to do as they pleased.
Things are changing. The Chinese stock market has tanked, the Chinese real estate market is a huge bubble that could burst at any moment, a number of high profile events have occurred that have caused the people of china to have less confidence in the ruling party. Lots of protests occurred after the major earthquake and after some of the incidents of breast milk contamination, etc. If the ruling party gets put under enough pressure and they have to act to build the public's confidence, you can bet your bottom dollar that they'll do what they've got to do. Will it happen? Who knows... but the past is not necessarily a good prediction what will occur in the future.