Yes, actually quite early in my discovery of the first webcam site I visited, there was a woman in her early 20's who was sitting at her desk gradually removing her clothes while chatting with viewers. She claimed to be in Germany, although she was typing mainly in English, (this site had no audio for cam shows.) She didn't do much more than chatting in various states of undress, eventually dancing fully nude for a few minutes, but nothing more explicit than that.
I couldn't help thinking I'd seen her before, she seemed very familiar, although I'd only been on that site for a couple days.
My confusion was cleared up the next day, when she walked past me at work! She worked in the dining area, and she had just been promoted to assistant manager. I never mentioned anything, and I also never saw her on that site again, although I was a frequent visitor for a year or so after that. She was always very professional at her job, but I certainly had a different impression of her after having seen her out of uniform, as I had.
I've also seen a few people I recognized, at swingers sites, where they had photos on their profiles. At least a couple were men I knew, and then some women I only knew in passing. None were of any interest to me as swingers.
I've seen women leave webcam sites after they realized they were being seen by people who lived near them. They were being approached out in public. Others have left after viewers indicate they may live near them. Discretion is important if you're doing that sort of thing.