What is one (two, or a few) thing about other dog owners that makes you cringe?

[Cheryl]

fat dogs bug me ... there is just no need for it and benefits the owner's needs and not the dogs ... i am dog sitting two pugs currently and one is so obese, she is double what she should be, a senior, already has issues with mobility and breathing, and the owner continues to feed her whenever she looks at him for food ... "cuz he wants her to be happy" ... i have had them almost a full month now and with the pug owner's approval, i put the fat pug on a diet and take her for four short walks every single day ... she is already looking better ... will now walk (instead of having to be drug on the leash) around the block ... i don't understand fat dogs ... and not only that the owner is financially comfortable (he is on vacation for two months) and when he first dropped them off he also dropped off a case of pedigree canned dog food !!! this guy is flipping rich and feeds them budget food ... with owner's approval i switched them to acana and they are doing great ...