Ok having taken some time to cool off after effectively being called a bigot I'm coming back to this. I have a counsin who can't hear. Another cousin who can't see and my gran can't walk or talk. Myself and my family have always given generously to charites for the deaf and blind to name a few. Just because we know of these things though doesn't mean we have a huge ammount of knowledge about them. And to suggest that people 'just educate themselves' is silly.
I have no objections to anybody with any disablity or condition working. In fact I'd encourage it. I will be the first to admit though that if I was served by a person who shouted 'wanker, cunt!' at me my reation would be: 'open mouth, wide eyes, blink, blink, blink.'
I would of course, catch on that this was most likely a condition and that they had no control over it. Fine. But I'm sticking to my guns when I say I wouldn't like this to happen in front of my dd. It would make me uncomfortable, what can I say, I'm only human.
It's all well coming at me with, but what happens if this was on a bus or in the street? That is a situation that nobody has any control over. In a store enviroment, someone has control over who serves on a till. I would think it more appropriate to say, let this woman serve people, but perhaps let someone else serve if there are young children in.
I don't see how that hurts anyone, and I'm sure that anybody with tourettes would understand someone asking that of them.
I think this has all gone way off topic. Of course the OP has a right to be uncomfortable at being sworn at, I don't know many people that wouldn't be. Condition or not.