I'm in a 5x5 ESPN Fantasy Baseball Rostisserie League.
I made a trade with the league manager:
I give up: Curtis Granderson, OF, Detroit
They give up: Grady Sizemore, OF, Cleveland
He accepted the trade but vetoed it later after rethinking it.

If someone else was the LM I would understand, but I don't have the luxury of vetoing a trade after accepting it and he does. Do you think this an unfair use of veto?