So don't go there. Buy something healthy, drink some water. There's a reason america is the most over weight country in the world, people have no self control.
She probably was talking to her friend, noticed you after that person came up to you, and just simply stated she hates you. Could have nothig to do with your 'skills' in ASL.
Have you ever owned a shi tzu? Those dogs are super hyper, and their ears are like lifeless flaps under a ton of fur. I wouldn't be suprised if she was trimming the dog's fur near it's ears and didn't realize she actually cut off it's ear.
Yes of course you're not disabled.. yet you want special treatment like touchscreen drive thrus?
Speaking a different language doesn't make you disabled and when one speaks a different language they don't recieve special treatment, rather, they must learn what others speak if they wish to...