It's not clear that these are "watch lists" in the sense that the parent or grandparent poster referred to, which would probably refer to something that automatically gets the individuals on it ongoing further attention or disparate treatment by the government. We still don't really know exactly what XKS is used for; some people seem to have interpreted the "scores" that are generated as though they were akin to the Chinese social credit score scheme (something that stays with an identified individual persistently), but I haven't seen evidence that this is true. It seems to me that XKS is a language and system for defining packet capture "scores" that search and capture Internet traffic meeting certain criteria, including arbitrary analyst-defined relatively-high-level criteria. Although an analyst using XKS to spy on particular people may know or learn their identities in many ways (and something bad could happen to them as a result), I don't see an indication that XKS is, or is linked to, a database that automatically "scores" or "watchlists" people.

In a traditional "watch list", those listed can expect to automatically encounter more scrutiny or problems from government officials in some kinds of interaction, like trying to board a plane, trying to enter the country, or maybe interacting with law enforcement or trying to file taxes. The XKS rules have in common with this that some people get more and different attention than others (which I can readily agree implicates their rights), but maybe in a particular moment as part of an analyst's activity, rather than in a way associated permanently with their identities.

While I certainly don't think anyone should have the power to perform searches like these, I feel like different senses of "list" are being conflated here, especially in the grandparent post's notion of "several watchlists". (I've been a part of the Tor community for a long time and have never heard of a report of anybody receiving adverse treatment from a government that could be attributed to Tor use this way... though it's certainly plausible that Tor users do get singled out in various ways by various governments for further spying.)