I could see that being a great trade under the right circumstances. The team recieving Johnson and Pittman probably has a quality #1 RB and Caddy, so he gets Pittman as a handcuff, and an upgrade at WR (thinking he is selling high on Portis). The other team is probably in trouble with his RBs since Pittman will sit for Caddy, so he trades for Portis (convinced that this weeks game means Portis will turn things around) at the expense of a WR downgrade. Assuming this is close to the truth, this is a very nice trade. Even if I am completely off, I still can't see vetoing this.
I am so smart. S-M-R-T