How would anti-dumping principals be applied to f/oss? For a long time, Ubuntu's number one bug was the existance of Windows. If company A is releasing a product for free, with the stated aim of damaging company B's market share, how is that not dumping?

https://bugs.launchpad.net/bugs/1

"Microsoft has a majority market share in the new desktop PC marketplace. This is a bug which Ubuntu and other projects are meant to fix."