The problem isn't Sharia, it's that they DON'T rule by Sharia (Zia Ul Haq did, but he was a one off as far as I know).
Why not raise your voice? They are supposed to protect the skies, yet they let the UAV's fly free and even had a base for them a few years back (wouldn't be surprised if it's secretly still active).
Why should I raise my voice against an institution which is defending Pakistan? I'm not going to dishonor the martyrdom of our solders. My cousin is posted in Waziristan, so I'm not going to play arm chair general by criticizing our Armed Forces when they have more difficult things on there plate.
Obviously, I don't like drone strikes myself, however, America is a super power, so Pakistan must tread carefully. Not all battles are won with the gun. Both of us don't know the ground realities. But one thing is for certain, it was the Army and its sacrifices that have stopped terrorism. Be thankful.