Chills, spills, and bozos at Oshkosh arrival

My friend Lee and I sat along runway 18 on Sunday as the arrivals come
into Oshkosh. Many pilots did a great job, but there were some notable
exceptions:

Chills: A Pitts snuck in under a Cessna on 18R, and the Cessna almost
lost its tail to the prop of the Pitts. The controller kept telling
the Cessna pilot to go around, and he finally responded in the nick of
time.

Spills: A low wing homebuilt stalled 20 feet above 18R and plopped to
the ground resulting in the right landing gear collapsing, apparent
damage to the right wind spar, and the plane slid off into the grass
where the pilot and passenger climbed out. The crash trucks kept the
scene busy for while afterward.

Bozos: Some fool tried to land on 36L while traffic was landing on
18R. Two RV-6's landing in formattion were going around to avoid
another plane landing on 18R, and they kept to the right to avoid the
incoming Cessna going the wrong way. The controller told the errant
pilot to turn right IMMEDIATELY and he eventually resonded. He was
then instructed to excecute a left 270 to land on 18R, but instead he
executed a left 180 and landed on 27. dyslexia or stupidia?