Basically, ignore it. When confronted with anti-Linux misinformation (FUD; or Fear, Uncertaintly, and Doubt), respond with information about Linux that correlates with its actual capabilities, not advertising hype and buzzwords.

This FAQ adheres to several simple guidelines for non-Linux content, which are briefly described in an article written by the FAQ Maintainer: http://www.mainmatter.com/fud.txt, reprinted from Linux Today.