Scrape*, for your title.
Meanwhile, preventing un-paid scraping was a big part of Reddit's rationalle for their en-shitification, ie, charging for API access.
I would rather train an AI indirectly for free than ask random Instances to run interference, which IRL works out to be pay-walling and selling user content.
By asking Lemmy Instances to "prevent AI from seeing my content", all you are really asking them to do is to slap a price-tag on it, and hire lawyers to pursue companies/users that don't pay. Not pay you or me, but them.
Truly amazing that the legal system in the rest of the US honors and enforces their edicts, or that anyone continues to do business within their jurisdiction, for that matter.