A set of scruples badly worn

Curious to know how some companies/orgs/whatever edit their own wiki entries?
How about searching Wikipedia by assigned IP addresses? (Walmart doesn't pay 20% less than most other retail, really! It pays twice the minimum wage! Mind, they're the same thing...)

http://wikiscanner.virgil.gr/

There's even a contest to see what the most disgusting corporate edit is..
http://blog.wired.com/27bstroke6/wikiwatch/

And people wonder why I sort of distrust Wikipedia...