I wonder what's the policy about answers involving ppa's.

This question came to my mind, especially after reading many answers on `Tor-Browser` related questions. In most of these answers, like this https://askubuntu.com/questions/514853/tor-browser-install-ubuntu-14-04 a ppa is recommended. Yet in the comment to the accepted answer my problem with these solutions is clearly stated.

Is there any policy you folks have already developed?

To me - thinking about quality on this page - it appears to be a problem, when there are answers - especially regarding security critical software - that envolve ppa's.

What are your thoughts or solutions?

Thx.