Why Yahoo Public Fantasy Leagues Suck

As some of you know, I'm a huge fantasy sports fan, and I often play in the free Yahoo leagues. Today I just realized a strategy that's individually beneficial while being collectively harmful to an entire league. The thinking goes like this:

Any trade made between two teams addresses unfulfilled needs that they have. As managers wouldn't take a trade if it was harmful, it's reasonable to assume that both teams will be better off after a trade. If two teams get better and the other teams don't change, the other teams in the league are comparitively worse off than they were before.

In Yahoo fantasy leagues, all trades must be peer-reviewed. This is done to prevent someone playing Kingmaker and trading LeBron James, Lamar Odom, Manu Ginobili, Ron Artest, and Shaq for Adonal Foyle. If four or more managers reject a trade, no matter how fair the trade was, it won't go through. This is done anonymously, and there is no repercussions for rejecting a trade.

See where I'm going with this?

If you're a manager of a team, and a trade comes up that does not involve you, it is in your best interest to reject that trade no matter how fair the trade actually is to the teams involved. That way, your team won't be made comparitively worse, and since nobody can prove it was you that rejected the trade, there will be no negative consequences to doing so.

Of course, if and when your team has some roster issue you need to address via a trade, you'll be SOL because the other managers will all shoot down your trade, no matter how fair it is.