You have a point.
While most packages from raspbian.org stable (now Jessie) are fixed, that does not apply to the kernel/firmware or the packages from raspberrypi.org.
While I don't think that policy is going to change anytime soon, you can guard yourself against to kernel/firmware upgrades by putting the responsible package(s) on hold.
You can do that in the following 2 ways (afaik), but you only need one:
aptitude hold <package>
apt-mark hold <package>
Do make sure you DO NOT use `rpi-update`!
It is both deprecated and does not integrate with raspbian/Debian's package management and would thus not honor those aforementioned hold commands.
HTH.
PS: Debian Stable wouldn't do that, this is a raspbian specific 'thing'.
You have a point.
While most packages from raspbian.org stable (now Jessie) are fixed, that does not apply to the kernel/firmware or the packages from raspberrypi.org.
While I don't think that policy is going to change anytime soon, you can guard yourself against to kernel/firmware upgrades by putting the responsible package(s) on hold.
You can do that in the following 2 ways (afaik), but you only need one:
aptitude hold <package>
apt-mark hold <package>
Do make sure you DO NOT use `rpi-update`!
It is both deprecated and does not integrate with raspbian/Debian's package management and would thus not honor those aforementioned hold commands.
HTH.
PS: Debian Stable wouldn't do that, this is a raspbian specific 'thing'.