People have tried to slip me cash many times for upgrades. There is nothing more insulting to me than this - and I make sure to tell them so, preferably within earshot of other passengers. Idiots!

US carriers are already struggling...the cost of most tickets barely covers the gas bill for the flight, they can't afford to pay us the income they agreed to in our labor contracts. Given all that, these passengers actually think I'm going to help them STEAL from the company? As if!