As far as flying through the notamed area goes, that is poor airmanship, and with todays aids such as Skydemon and Runway HD there is little excuse for not being aware of these areas.
I fly in east anglia. Some military NOTAMs cover huge swaths of the area, including our airfield. If I didn't fly every time there was a NOTAM I would hardly fly at all. We try to speak to the controlling authority, or call them up after take off, and go flying.