It's not $7.00 for a pinky on Scottrade (I know because I use it)...it depends on how much you sell, but I'm sure that trade if they were using Scottrade was $8 or $9 dollars minimum...then again, I'm sure it wasn't anyone actually selling using scottrade, just MM's playing games with us amongst themselves.
Even if it's not 7$, how is selling 4$ worths of stock and paying lets say 8$ commission saving him exposure/risk? It really can't because he would be paying to make the sell. He should have kept his shares and hope for a gain sometime!