There were more than one person using different techniques to screw with the LLM bots. Haven't seen anyone but them personally in a whole. I think they also mentioned their job or hobbies include something with old language.

I highly doubt changing a couple characters screws with the data scraping much. Or that it matters if it does but I also understand wanting to protect your own thoughts and words.

He mentioned it at some point in the past

Fetch, even.