A Wikipedia user may create an account under an alias.

Your changes will immediately be visible to all Wikipedia users.

Chinese Wikipedia users and critics say the differences highlight the resilience of a system of information control whose reach goes well beyond simple censorship.

Again, Wikipedia users generally seek to prevent this happening.

But the broad group of Wikipedia users was not so supportive.

Another Wikipedia user who has only ever edited one entry goes by the username "Ice run wild".

Essjay's Wikipedia user page (now removed) made the following claim:

A Wikipedia user with the name "Jamesthomas101" deleted the information.

Wikipedia users will see a magnifying glass replace the padlock icon on previously locked or restricted entries.

He estimated that 100 million English-speaking Wikipedia users will be affected by the blackout and warned students to "do your homework early".