Google “OCD jokes” and “Tourette’s jokes” and you’ll see a big difference. Of course, OCD is no stranger to stereotypes — but they are at least much closer to the truth than the ones about TS. People with OCD do not necessarily, but do frequently have obsessions with germs, neatness, symmetry, and orderliness.
So it’s not that I have a problem with people making fun of Tourette’s. As long as it’s done in a respectful way, it’s OK to make jokes about pretty much everything in my opinion, and can add a touch of optimism to an otherwise depressing situation. The problem is that when people make fun of TS, 9 out of 10 times, they’re not even making fun of TS — they’re making fun of what very few people with TS actually do. Not just that, but they’re making fun of what very few people with TS actually do while wrongly assuming they do it out of anger or inability to control rage, or at the very least poor impulse control in general, which is also not true. (Some studies indicate people with TS might actually have better impulse control than the general population, because they have so much practice resisting impulses!) So they double-misunderstand it. You can’t make fun of something you double-misunderstand. So all I ask is that before you make a joke about TS, learn what it actually is. I’d be happy to laugh with you about how I randomly blink, clear my throat, sniffle, or gasp repeatedly at inappropriate times because I can see the humor in it — I just can’t see the humor in something that’s mean-spirited, or has no bastion of truth.