I don't want to VETO any trades. We are all men and we can decide on trades that we feel make our teams better.
HOWEVER,
What I do not want is guys exchanging stars in unrealistic fantasy league trades. What I mean by this is guys trading their top players. I don't want to see Tim Lincecum getting traded for Joey Votto, Josh Hamilton for Ryan Braun or Jason Heyward for Adrian Gonzales.
Also, we are going to limit trades to only 2 per season. With free agency and minor league rosters, I think more than 2 trades would be overkill. You are allowed to have 2 for 2 or 3 for 3 player trades, but you only make 2 so make them good!
So in review, the only two rules are...
1. NO ridiculous fantasy-league type deals
2. Only 2 trades per season