I said it's an option. I wouldn't blame a frustrated, legit owner for doing it. I wouldn't let them play in my worlds but I'd have a tough time stringing them up from the nearest tree for it. In short, you've got a group of owners trading freely and restricting you from doing anything. You've already paid your money so they're getting their enjoyment and restricting yours. So what can you do?
1. Abandon the team. Doesn't resolve anything but you're no longer irritated by opening up the screen.
2. Play out the season as best you can. Frustration mounts when you fall a few games short of the playoffs because you can't fill a hole.
3. Report it to ADMIN. We know that they'll look at the situation, post a warning about "fair play" and tell you to leave the world when the season ends.
4. Be confrontational and make the world chat miserable for all. Then you'll get reported and banned for your troubles.
5. Attempt to make the world even more 'tarded up. Since you can't trade your players, what can you do? Release them, sign crappy deals, demote your stars, fatigue and injure your prospects.
I wouldn't do it. I've been tempted but it's not my style. The better way to do it, so ADMIN won't undo the deals and remove you, is to be a little discreet. 1-2 players at a time while keeping your mouth shut. Incorporate all of #5. Then, when the season is ending, go apeshit with #4.