I really hate people who are predatory who knowingly get over on other people with trades or purchases. Like I hate when someone knowingly trades junk/unwanted items to someone else to get something in return that has a greater value. Or like when someone knowingly buys low on a product from someone else and then turns around and resells it for a significant profit. I also hate when someone takes advantage of someone in turmoil by forcing an unnecessary/unwanted service, part or product on them when it clearly was never a solution.
I admit I equate them to sexual predators because they're basically doing the same thing with preying on someone else who's in a vulnerable position. Just because someone didn't take advantage of someone else by a sexually inappropriate means, it still doesn't justify that it's OK to knowingly take advantage of someone's lack of knowledge in a business deal or trade.
Any productive deal should equally benefit both sides as I learned from reading a book about NFL agent, Leigh Steinberg. While that will not always be a formality with a 50/50 split on every trade or transaction, at least there shouldn't be a significant disparity. Like if one side ends up benefiting just slightly more than the other side, then that's OK.