Lets see here, I do the stop sign one at a parking lot here in the town that I live in. This particular stop sign is completely stupid to have where it is as there is no sane way that some one would hit you any ways.
I've had some fun with signing credit card receipts and no one has ever said a thing, even when I wrote "this is not my name."
I also follow the rule of about 5000 miles before an oil change, my step-dad started me on this and I figured since he does work with construction machines and does the same with his trucks I can trust him about it.