Forkner's actions have brought all ARs into disrepute.
I'm unsure if Mr. Forkner was acting in a DER/AR capacity when flying, but in nay case, he sure knew the significance of what he was doing, reporting, and signing for - even if it was just returning the plane for the next pilot to fly.
But, it is certain, that even for a few non flight design requirements, a DER/AR signed for them, when they we not complied with. In my opinion, Mr. Forkner did not do his duty as a pilot/person in respect of all the other people he knew would fly, and fly in that aircraft, he should have spoken up. The fact that he managed to fly it, does not mean that the plane meets the standard of "must not require unusual pilot skill and attention". If in doubt, stop and discuss, don't sign it out and on to the next.
yes, DERs/ARs have been brought into disrepute within Boeing's corporate structure!