Not for nothing. But I don’t think the TSA over reacted at all.
I agree - he had enough flags not only to be detained but to be watched in the future. This would not be the first time that someone was testing the ATF.
I was once detained at Lod airport in Israel on very circumstantial eveidence. Each time I detected that a part of my story/account was setting off alarms in the heads of those questioning I made the mistake of saying how I understood something looked bad. My familiarity with their concerns only warranted more questioning. At the last minute - I was allowed to board the plane and was seated in the section among others being watched. The interrogation was fine - but my new seat companions made the 9 hour flight a sleepless one.