Is the other guy a competent owner?
I don't see why people or leagues veto trades unless there is obvious collusion.. If the owner thinks he's getting a deal or wants his team's best player or whatever.. I mean it's his team and who knows maybe he has some inside info on some stuff
I mean I know I follow football a lot more than a lot of the guys in my league.. And I've also played so I understand the effect of other things on the feild can have, so I try and use that to my benefit when things come up..
And part of the fun is getting over on the guys.. If I know someone in the league is a huge fan of some team, I'll factor that in come trade time and try to use it to my advantage.. Or if someone is inclined to make panic moves, I try to take advantage of slumps (like the guy who currently owns jimmy graham in my league)
I'm just not a fan of the other guys in leagues who guys have to play against having that option to vote things down.. Because 90% of the time they are only thinking about when they have to face that guy.. Or winning the league