Not necessarily. If that is one of the things they were/are doing then most likely they would only do it with SuMo at first and if it works then do it with future games. Thus, homebrew would not trigger the system and currently installed games wouldn't trigger it either unless and until those titles were added to the list of ones to do the v0 check for. If I were implementing such a system that is how I would do it, start with something big like SuMo and if it works well enough then do the same for future game releases.
Exactly, which is why if they are doing that it would only be done for game titles in a specific whitelist rather than for everything.