On Wed, 24 Jul 2013 01:19:16 +0200 (CEST), you wrote: >As I understand it, the warning stems from the possibility that the PPA could >have both Free Software and proprietary software. Once added, it is possible >to accidentally install the proprietary software as well.
That is also true, but as someone else pointed out, it's a matter of trusting the people who manage the PPA. By adding it to your system you install their own "unverified" binaries that may contain e.g. a rootkit or a backdoor (note that when you install a package you use root). Now, if the PPA is managed by a random guy who has compiled some source into binaries and packaged it, you may not know what it's actually been delivered to your computer (for example, see the cloned jay-z app news[1]). Best, -- Stefano Fortune of the day: "There will be big changes for you but you will be happy." [1] http://it.slashdot.org/story/13/07/04/168207/anti-government-hackers-hit-jay-zs-android-app
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