We know that the internet is a very useful tool to communicate, the problem is that many times we do not know who we do it with and that could bring us serious consequences. If all Internet users were OBLIGED to reveal our true identity, there would not be so many cyber crimes. For those people who "work" on the internet, buying, selling, bidding, among others, they must be completely genuine.
In conclusion, we should know when to reveal our identity and when not.