In response to Tudor comments, I love chavvy pax too, you can have a laugh with them and they generally sit down and shut up and are still a bit in awe of flying.
Gold card holder threw his heavy Louis Vuitton rolleboard at me as I explained that I couldn't stow it in an overhead locker. He had red wine in there and a laptop and they all got smashed up, shame! He threw a hissy fit so got offloaded. I just found him really funny, it wouldn't have been funny at 30,000 feet. He then threatened to 'have my job' and I told him he was welcome to it. In a previous life I was a dancer so I managed to avoid being struck with said suitcase.
I get frustrated but do I have a go at the cashier in Boots/M&S/Waitrose or the server in Pizza Express? Do I feel the need to throw a bag at them and threaten to get them sacked? I have never been in a situation where I lost my temper like that.