The other thing to note: FD have granted "protected" status to procedurally-generated factions that have been formally adopted by player groups - the same protected status that is granted to other player group factions - meaning that other player group factions will not be unilaterally dropped into those systems. Procedurally-generated factions which have not been formally adopted do not have this protection. So be aware, it's entirely possible for you to put months or years into quietly working for "your" faction, only to have FD "give away" your faction's home system to another group. And you can no longer apply for protected status for "your" faction, since FD no longer allow formal adoption of factions.
This is the main drawback to "picking a random faction and supporting it" rather than forming a faction of your own. And, if FD keep adding new player factions at the current rate, it becomes more and more likely that "your" faction's system will be targeted.
This is the main drawback to "picking a random faction and supporting it" rather than forming a faction of your own. And, if FD keep adding new player factions at the current rate, it becomes more and more likely that "your" faction's system will be targeted.