What's the proposal for the alternative? The web platform is built on open standards, the majority of which (more than in any other ecosystem), is driven by open source implementations. For those hackers among us, the web is our oyster and it has fostered a great deal of innovation in the exact way that the FSF has worked to foster it in other ecosystems (e.g. Linux).
Assuming that there is a noble and sane goal behind this call to action (which I'm still having a hard time believing), the way this article is written does it no justice. I imagine that this article has become the laughing stock in offices across the country and the world this morning. Presumably not the effect the FSF was looking for ...