I think the only way the article could be less credible is if it were an onion article. The inquirer?

Indication #2 that it may not be entirely correct:

A US school teacher has taken the somewhat stupid step of throwing the open sauce operating system Linux out of her classroom.
Writing in his bog, Ken Starks said that the letter from the unnamed school teacher showed what an uphill battle Linux people had in dealing with entrenched attitudes.

Questions of validity aside...it's quite an entertaining article.

At this point, I am not sure what you are doing is legal. No software is free and spreading that misconception is harmful," she wrote.
I am sure if you contacted Microsoft, they would be more than happy to supply you with copies of an older verison [sic] of Windows and that way, your computers would actually be of service to those receiving them."