What are some kinds of Web sites that should prohibit anonymity and why?

Some websites like proxy bypass and virtual private network (VPN) prohibited the anonymity as it affected the surfer during long rum in the system.

The proxy bypass is the type of the server that mainly used in the local address. The proxy is the type of he intermediate server which basically stand in the computer and also in the remaining part of the internet. This is basically used in the corporate for the network protection for using the content in the system.