It’s good to remember that a benefit of open source software is freedom from anti-features. The wiki (the second link) has examples of anti-features. E.g. I wasn’t aware of the Vista anti-feature where it slows down network connections when it detects any sound playing.
* [http://lwn.net/Articles/370615/](http://lwn.net/Articles/370615/)
* [http://wiki.mako.cc/Antifeatures](http://wiki.mako.cc/Antifeatures)