It is human culture, and very Asian culture.

Who will be proud to post about their failures? Everyone also have abit of ego (some more than others) Everyone also want to feel good about themselves.

Hence, if you look at the salary section, all the posts (assuming they are true) are probably the top 10%.

Nothing wrong with it. This is good data. It is how you choose to digest the data. I see alot of people getting demoralised. Some get angry and flame those who post high salaries. Or, get angry/jealous and post ficticiously high salary themselves.

I see it as good data source.. take some data points, discard some data points. More info is always good