I wouldn't count on that. Most of us wouldn't do that to the aviation world. Decreases plane availability, especially for something like a T-34 Mentor, increases insurance rates, increases FAA stance on already asinine policies, etc.
occams razor - he misjudged his aerobatics.
It's not really plausible that he misjudged the altitude. His altitude for that maneuver was about 2000 feet lower than it should have been. I've also flown a T-34 (my dad owned one on Orcas Island... I kind of wonder if Bill bought his from Dad) and did some aerobatics around Orcas. We were at much higher altitude.
i only know of two - one was a stolen plane by a mechanic or ground crew, not a pilot. the other was a mass murder, not a fantasized suicide.
If that “error” was intentional, it would be very hard to prove.