Appears he didn't break any rules.
He walked through the WTMD with nothing in his hands.
He was repeatedly asked to put his shirt on. Not sure if it was issues of decency, or political statement. Then again, how many 1x/yr travelers know who "Big Sis" is?
He was
not patted down. If he
really wanted to make a statement, it wouldn't have been hard to force the WTMD to alarm. Would a single car/house key in a "5th pocket" be large enough to set off the WTMD?
Single-layer clothing screening. Have fun.