Linux is illegal. And it can't be free. There's no such thing.

Here's a great example of what happens when people don't know what the heck they're talking about. In this case, a teacher accuses a Linux group of facilitating 'piracy', 'spreading misconceptions' that there's such a thing as free software (in this case - Linux), and threatens to get the police involved. Some of the group's response can be found here.

[Update] The story has evolved... for the better.