Shapov, there is logic and algorithms that prevent bad data from entering the data set. The data you entered for example would not go into the data set.
bdwalter, we do that we we can verify real people are contributing to the community to keep up the integrity of the data. Tweet me @jasonnazar if there is specific data I can find for you :)
The problem is you want to eliminate friction. If you can suck someone into your platform and then, later, say "oh btw please verify your email address to we can publish and share your salary. Anonymously, of course".
The way it works today I have to grid through all of these forms before I get ANY IDEA what kind of value you may or may not give to me.