So you would force people who want to play on a small team to either join you against their wishes or quit the game?
Another issue that your suggestion ignores is there are groups that break off from a team for various reasons. They form a small team and stick together while they weight their options. I know a few groups that have gone this path and these groups ended up in Sapphire and high level platinum.
Your idea says they cannot do that. That they cannot stick together until they figure out where they will go.
It would seem to be the logical path would be a better way to search for active players to recruit rather than strong arming them, which is exactly what the presented idea is about. I for one would balk and such an idea as I was one that was in a small group while we looked for a new home.
So your idea would hurt players.
Edit: it does seem that there is no support for your idea of disbanding teams. Further, I suggest there is an idea for a better way to search for active players. Maybe a means to filter better. The same would go for a better means to search for a team.
However, it should not be players putting themselves into the db for reasons already brought up. They can become the subject of reprisals from their current leadership.