I agree 100% on correcting dealers.
In poker, I will correct every mistake I can. Sometimes I just give up if someone shortened the pot, I explained it twice, and I am still getting blank stares as long as I am not involved in the hand. If I am, I will have the pot counted down.
I have also corrected cashiers numerous times, and they seem to be in my favor. One lady just kept trying to give me an extra $100.
But in the pits, I play for keeps. It isn't hurting the dealers to be ignorant when they are making mistakes in your favor, if anything, I might tip a bit extra. It is the casinos fault for not training them or hiring enough people so they don't have to work overtime, etc. etc.
I still to this day think I am +EV at Texas Hold'em Bonus in Vegas due to card sharing and dealer errors. You simply bet thinner when the rest of the field has a pair+, and say things like 'Straight!' when I have K5 on a 3467 board and the dealer has 58 and hope to get a chop. But if it was reversed, I would let them know I had the winning hand
.
BTW, I am going to Vegas this weekend, so another chance to prove I am a lifetime winner at Texas Hold'em Bonus.