One solution for this of course is to NEVER update your player that is known to be Cinavia free, and rip and copy every blu ray disk you buy. The regular AACS protections are updated, which is why you normally have to install new firmware anyway, but if you rip your disks, the AACS protection is removed, and thus you have no need to update your stand alone player.
The problem in the future is to make sure you don't buy anything with Cinavia already built in. None of the media players, like the Western Digital TV Live, have Cinavia, and I doubt there is any incentive to put them into such devices, since they do not include a blu ray drive.
So what they may be doing is pushing the more knowledgeable users to devices that will not have Cinavia. Home theater pc's will also be immune to Cinavia, since we have so many free software media players that are now capable of playing HD mkv and m2ts files. Even if they try to force Cinavia into PowerDVD, or Arcsoft TotalMedia Theater, we have good alternatives in existence, like Media Player Classic HomeCinema.