wise words as always Gene
at least we've not come across the one thing that REALLY gets my goat - where you pay and they keep the change automatically
when that happens, I always make a point of asking for it, taking it and then never returning!
as far as never visiting a place again where we've been overcharged..... unfortunately it happened (more than once) in a very popular bar that we love, each time we pointed it out, there was the immediate apology and refund
thinking back though, that was only with one particular waiter!
we usually have another waiter, but he's now in England so we'll just keep our eyes peeled and make a note of our drinks in future