The reason you don't see a more practical suggestion from them is the suggestion involves "none of the currently above options".
Of course those of us who know about xda-developers.com and are handy with adb can easily bypass this in most cases. But we're in the minority. The average joe, the vast majority of the user base is either incapable or unwilling to do these things.
Unless you've got a rooted & bootloader-unlocked device running an AOSP-derived ROM, Google's dream of an open mobile device OS only applies to the carriers.
This is new to me. Got any proof?
As far as I know in the US it's just AT&T.
Perhaps next we will have GPL with logic bombs sent via email...
Yeah, it was a joke. Still,seriously any strongly dogmatic organization will exhibit obvious inconsistencies of common sense, while holding to the logic they ascribe to.
I can consolidate every FSF pronouncement:
Don't use cell phones, they're all bad. Do not browse the web. Instead, have a cron job download a text version and mail it to you over uucp, every day.
I might as well build a cabin in the woods. Or you know, compromise based on my own comfort level.
Edit: I do value the FSF. I would just like to see more practical suggestions for the layperson from them. Not everyone can lead the techno-monastic lifestyle.