I don't really get your point.It's not really "your" faction or Cannon's faction, more than it's mine. All factions are NPC and anyone can have their squadron pledged to any faction they want. The difference now is that you can use colonization to expand them through new colonizes, but in reality makes no difference since it was all fluff from the beginning so no one really cares except maybe people role-playing a particular faction. But it wasn't "their" faction to play with anyway.
Player factions were created by players and put in the game by fdev on their behalf. The players chose the name and the home system of their faction. But even if you adopt an NPC faction it is still your faction in as much as your football team is your team.
Its true that anyone can create a squadron and align it with any faction player or otherwise that they wish. Nobody can stop you aligning with any faction. There are probably a dozen player groups who are aligned to The Dark Wheel for instance.