hate it but I wouldnt veto it. Maybe the Bynum owner thinks Bynum is going to miss 2-3 months as well. I still think he can get more for sure. But unless there is some reason for you to suspect collusion, i personally would not veto it.
I know somebody who traded Granger for Hinrich in a h2h (Your thinking is basically saying its a 3rd rounder for a 13th rounder, but a lot has changed since then). In our league, the guy was thinking, he essentially preferred ANYBODY over an empty slot in a h2h.
Still think eeww cause its Bynum; but credit to the owner GM, he is trading for two injured guys who's value is SUPER low.
You cant penalize him just cause he traded hot guys for cold guys while you were sleeping.
No veto unless you can prove collusion.