How is operating an aircraft within its performance envelope irresponsible?? I believe that there was much more than climbing within the envelope going on that lead to the Pinnacle crash. Lets compare:

Climbing at V2 : within the performance limits of the airframe

Pinnacle : Operating above the max altitude in the area of coffin corner, switching seats, improper restart procedures, overflying emergency airports...

Yep...these are one in the same in the responsibility arena!!