The policy proposed is explained in the wiki page and is implemented in the beta code of the AM. I'm not sure either why it hasn't been discussed before bt the fact is that it's not carved in stone and nobody is claiming that is bug free.

I have left more comments in the bug report. Andre and the Igalia developer in charge of the implementation are in the Desktop Summit and I have chatted with both about this problem. Maybe not too much happens code during July since most of us will be on holidays but we will find a solution for this before Fremantle goes to the hands of users and this policy is effectively enforced by the AM.