Exactly CFerguson. Negotiations are most successful when both parties feel like they got a good deal and are happy. Whether it's buying a car, trailer, or negotiation a defense contract (which is my line of work). It has to be win-win for both parties, or it stalls.
As far as slamming folks for taking discounts, like OP does, you need to look at it differently. Dealers are well aware of the game. Why do you think MSRP is so different with different dealers on same models? They offer the discounts because consumers have come to expect them. They raise the MSRP a little if need be, or drop it a little, to show an even better deal. These discounts are already factored into their bottom line price they will accept for the unit. Even if they only paid 50% of the MSRP on the unit, don't forget there is interest they are paying while sitting on the lot, there's prep that has to be done before it goes out the door etc.. all that factors into their equation.
The job of the salesman (and dealer) is to make as much money as possible legally. The job of the consumer is to get the best deal they can get, and when both parties are happy, the contract is signed, and they both smile and walk away.
Why that is perceived as bad is beyond me.
Mike
