Something about Jetfire...

Unless you know about the Decepticons and their insignia, I don't think the Con symbol would be any more noteworthy than the Skunk Work's skunk painted on the wings. Or any of the other insignias or decals or whatever on any of the planes in the museum.

Kreon Art Thread -- Transformers Scale Project -- Kreon Parts Database

Generally aircraft afficionados go gaga over insignia and markings, so a prominent, ominous looking sigil they've never seen before would probably raise a few eyebrows.

"Oh it's nothing, I saw the same mark on one of the F-22s at the base last week!"