I understand the desire to deny certain content to solo players, after all, it's an MMO. But then then system should start to suspend FC benefits when the FC has less then a certain number of active players.

For example when only less than 4 people have logged in within the last 30 days, all Company Actions are disabled. When less than 4 people have logged in within the last 90 days, the FC gets an removal notice that in 30 days their land will be taken away and re-auctioned. (Obviously, with other detailed rules to prevent people just grabbing someone off the street and kick them after 3 seconds.)

If you're going to slap one-man FCs on the face, you should have prevented their establishment in the first place.

And create instanced personal housing that doesn't have access to these FC-only content. Win-win all around.