I don't see how this is vetoable. If the team getting Turner has good QBs and WRs, then it's worth the risk. If the team trading him has bad WRs and QBs, it's what he needs to do. I have seen a lot worse trades in my league.
12 Team League. We start 2 QBs and get .5 PPR, otherwise standard scoring
QBs: Stafford, Fitzpatrick, Collins
RBs: Charles, Mendenhall, Best, Starks, Carter, Karim
WRs: D. Jackson, Marshall, S. Smith, Green,
TE: Hernandez, Cook