Felt good to cut off a customer being a nuisance mark downer. I'm all for offering a discount to customers but when they begin to violate the mark down policy that's when I mind. Usually I just be firm and despite management giving me half a$$ed replies too chicken to do anything about it I just tell them "I'm sorry but management said no more." It was also getting old when it turns from helping to being taking advantage of and these customers were very much taking advantage of my kindness. Which is why I don't trust anyone in the retail world any more. One ounce of kindness and people will abuse it to no end. Despite it being unethical to do so. 

I feel bad each time I do this but just because you want to get something at 80% off and I have to pay full price doesn't make it right to do so.