I know you may hint it is not fair to expect the company always publish good news to push up the stock price. I agree with you. A mature company should not use anything to manipulate the market price. It should be either under strict regulation or be open enough to be trustable.
It's not fair to expect them to try to buck up the share price because it would be illegal for them to do so. At least if this was a "real" stock.
yes you are right. But it is equally illegal to do something to crash the price. For example, to promise something and then break it without even an excuse.