Re: Why not ban pit stops when the safety car is out.
Wasn't Vettel ahead though? So in this case he didn't gain position. He was just lucky with the timing of the safety car between him pitting and Hamilton doing so.
I suspect that whatever system you introduce with safety cars, some poor bugger will always lose out. They created the virtual safety car so the person who'd carefully built up a lead (possibly spending their tyres to do so) didn't then lose their track advantage. Perhaps the answer is a pits time penalty, to mean pitting gains you no advantage in track position? I don't think you can ban pitting - as in this case Vettel probably had to pit around that time anyway, given Hamilton had just done his.