The wiki page is created for people who want to type out their knowledge onto a site for others to review. Some wiki can be true, some cannot as anybody can change anything.
SonAmy does not currently have a Wiki page at this time. However if they ever do get a Wiki page it would be used to gain information about who they are and what they do.
To add the wiki-holic badge to your wikianswers profile page there is a link that you can copy and paste.
I'll assume you're referring to disney.wikia.com. Their main page claims the wiki was set up May 8th, 2005, and the wiki was founded by User:Evanwohrman.
The two main privacy settings, however, are Account Creation and Require Users Sign-in. You can set these independently for a wide variety of site privacy levels.
The Vault - wiki - was created in 2005.
There are many Wiki websites in the world and on the web. Results show that 32% of all websites have some kind of wiki program and/or wiki website added to it.
Check out the table on this wiki page http://en.wikipedia.org/wiki/Ionization_energies_of_the_elements
A "wiki" is a type of website. "Wiki" is not a thing that "has" other things. Asking your question this way is exactly like asking "Why does magazine have Newsweek?" The reasons for the existence of WikiAnswers are explained in the "About" page and at the bottom of this page.
According to the information on the Wiki page, Ross Capicchioni was shot by a person named Vincent Smothers.
The Wiki Way was created on 2001-04-03.
Wiki-Watch was created on 2010-10-31.
Omaha, Nebraska. Per his wiki page. http://en.wikipedia.org/wiki/Sting_(wrestler)