All pages (except search results) have an edit tab at the top. You can edit the page you are reading by clicking it.
Quote from another user:
Interesting, but why let someone drinking lots of beer edit a random page?
Because we assume that most people didn't drink beer or respect the work of others. Also the admin can restore old versions of the text. And for all people the have drunken Beer we have the sandbox? and UserChat pages
Last edited by rabiddog