Public content is still subject to copyright, and I doubt that AppleBot only scrapes content carrying a suitable license. And "fair use" (which is unclear if it applies), in case you want to invoke it, is a notion limited to the US and only a handful of other countries.
Why would they? From the moderate of testing I've done of their handwriting recognition on an ipad, they seem to have everything risqué/offensive I could think of in there, even if you have to write it more clearly than other words. I don't expect this to be much different, other than a word filter on the output.
I mean for their large language model training. They said they don't include low quality data and swearing. This means you can get out of it by swearing.
