They've got to make sure all decisions are equal. If Massa gets a drive through, everyone else must get a DT. If Heikki's engine blows up, everyone else's engines must spontaneously combust.
I swear it IS just to see how overtly filthy the FIA dare show itself. After the Spa high-low, I stopped being an F1 fan and became an FIA spectator. That's all I am, now.
Perhaps Lewis was overly aggressive at T1 again, but if that was a DT then surely Massa's move should at least be a stop - go. They're simply not comparable incidents