While I agree with you on all of these, it's the converter thing that really grinds my nerves.1st things 1st, I'm not the brightest bulb in the chandelier, and you'll never hear me claim I'm right in the head.
But please tell me I'm not the only one who gets annoyed with silly simple $#!+ like:
1) Cadillac converter. It's Catalytic.
2) Camaro owners for sale ads selling their "Camero.
3) Car dealerships listing "2-door" as a feature for a Corvette.