I've never met anyone with Tourette's (that I know of). Previously my knowledge had been pretty stereotypical, based around the more sensational tv shows.
I knew that people swear excessively and loudly. I'll be honest, I thought that it was 'one of those' illnesses 'like ADHD' where no doubt some people had it but others were just badly behaved and using it as an excuse.
Sorry that sounds pretty awful, but you asked. Anyway, I will redeem myself a bit now, I hope.
A couple of years ago my small child was diagnosed with autism. We had no history of neurodiversity in our families. Again, my knowledge of autism was very stereotypical and limited. It was a shock and I soon found myself going on courses, reading books etc so that I could help my child.
Fast forward a few years, hours of reading, research, living with the condition, going through the process of getting an EHCP etc and becoming very involved in the SEND world ... and lightbulbs went off for me. An ASD and ADHD diagnosis for me followed. Y'know, one of 'those' conditions. Eyeroll and facepalm at myself.
So, to Tourette's. I am still by no means and expert. I know a little more than I did because it's a co-morbidly for the other conditions that I've learned about including my own. I now understand that it's a neurodevelopmental disorder, that is also a spectrum. I understand that tics take various forms, verbal and physical. I understand that people can't help having it or control it. I understand that anxiety is a factor in worsening of symptoms. I wouldn't judge someone who was tic'ing, I'd see if there was anything I could do to make them more comfortable if possible and appropriate.