This is nothing new. It's been going on since the beginning of gambling, not just on pool, and will continue to go on. When people get desperate and short on funds they will often times do anything to make some quick cheese. Why do people steal? Most of the time it's because they are broke.
It is up to the staker or bettor to make sure they have their money in a good spot. I've never been dumped but have bet on the side of a few suspected dumps (luckily on the right side of most of them). If you know the slogan "buyer beware" and live by it then there should be no problem. It's always up to the staker or bettor to do their research.
I don't mind if someone doesn't cash and hold no ill will towards a player I buy in a calcutta or bet on. I made the decision to put my money up and that's that. This is why I also won't give jelly to someone I buy in a calcutta. I put up all the risk, I get all the reward.
I will hardly ever stake anyone simply because it's not a good financial decision in the first place. Rarely is anyone a 2 to 1 favorite in a gambling match, and if it is that case then the player usually has the knowledge or means to get all of their own money in the middle. There are only 3 players I trust 100% to play with my money, Stevie, Bruce, and B Whizzle. I would also trust Matt Bulfin with my money but not sure I'd put him in the "player" category, lol, jk sorry Matt.
The sum of all this is that dumping and chopping is gonna go on. It's just as simple as that. That doesn't make it right and it's the same as stealing in my opinion but if I get dumped or am on the wrong side of a dump when I bet then it's my own fault.