The issue isn't about being able to build on top of what you built. This can still be done by open sourcing your app. The issue is distribution. Those people may not be able to redistribute the app, but they can still contribute code.

> values expressed in the GPL: allowing your software to be built on by those who agree to return the favor.

GPL3 has gone far beyond that; instead of just requiring that the software be usable as a starting point and building block for new work, it now also mandates that it be user-serviceable. You don't just need to be allowed to modify the tivo software to make your own dvr, now you also need to be able to modify the software in-place on your existing device.

> don't just need to be allowed to modify the tivo software to make your own dvr

If you can't do that to your TiVo, is it really yours?

The part you quoted isn't about doing things to your tivo. For the part that is, are all of my gadgets that are built with non-standard screws also "not really mine"?

With a TiVo (as with an iPod, a VCR, a PlayStation) you are either pretty much happy with what it does or royally screwed (with non-standard screws).

If you are happy with your TiVo, then good for you. If you are not, you cannot bend it to your will. It would be much better if users could do that, but, unfortunately, we are not that lucky.

You can always sell your TiVo and build your own DVR.