I feel a lack of privacy. When I looked up somebody via LinkedIn, that person was sent a notification. When I looked up somebdoy from SNS such as QQ, it shows up on the list of recent visitors. When I tried to download a paper written by somebody via ResearchGate, the author was informed. When I tried to sign up for some accounts or services, they asked for signing in via Facebook or Gmail. When I signed up for two accounts in a forum, they banned my accounts as the forum checked the IP address of the users. When I made a posting on a forum, the moderator sent me a warning that I was not allowed to post via VPN. At that time, I was not able to access some websites due to internet censorship in the city I was traveling in. Why all these tracking on the net? Life was much better before the existence of www, smartphone and SNS. When I asked for direction on the streets, please asked "Why don't you use your phone to check?" When I asked some officers to provide information, they just said "The information are on the net.".