I get TSA Pre (or, as I like to think of it, "grown-up security") pretty often in the USA, flying AA on an AA frequent flyer number (often booked with BA). I've never signed up for any of the US border crossing special programs, and I am not (nor do I appear) of pensionable age.
I do not have a beard, so perhaps I don't look mad enough to take over an aircraft. I've also never entered a flight simulator and said "landings aren't important"; my landings are fairly reasonable as it happens

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[1] for an amateur assisted by a BA FO...