I doubt that anyone would ever have noticed. I can understand the desire to tell people though - whenever I am over changed in a shop I always tell the person on the till (usually much to their mystification). But with the example I gave about the baguette above I just figured that for them to do it once was careless but twice then.. free baguette for me.
I heard a bird cry, sharp and free. My name is Jordan.
I actually did wonder if that waitress would get into trouble, but then it occurred to me that to go back to the restaurant and bring it to their attention might have actually got her into trouble if no one had noticed before. And we had queried the bill before we left, so they had chance to check it.
Funnily enough though (and back to the OP subject), I stopped feeling any guilt about the restaurant after we were charged so much to park. Like I said, totally illogical and unrelated but I felt better that things balanced out.
LIfe is just a series of random events that we have no control over. We can attempt to steer it the way we want but something is going to happen to put a klinker in our plans. When we adopted our daughters one of the questions asked in our paperwork was how do we plan to raise them. My answer was to muddle through it the best we can and try to do the right things.