Earlier quoted context omitted.
what you are describing is relevance based on user input (be that cookies, search history, interests, a preference for x over y) that may be used as identifying information, which vastly de-anonymises the service. if a search query is too ambiguous then it can be refined. if the user knows they want a programming language and not a snake, they can let the search engine know themselves. don't sacrifice their anonymity…
Presumably, the most common search preference lists would be used by very large numbers of people -- for example, almost all programmers would rather see Python (language) queries over Python (snake) queries and would probably all be using whichever search preferences become the most popular and well-maintained, like "mit_cs_club.json". A subset of those would also be into anime and enable their anime search preferen…
the more anonymous among us tend to opt for common IP addresses and common user agents to become the tree among the forest. adding a profile to that would, well, only add to a digital fingerprinting profile
> those preferences don't need to be attached to you, just your query
that's not how it works. preferences are by their nature personal. every transaction would have your interests and hobbies embedded, on top of metadata
> mit_cs_club, studioghiblifans_new, britains_best_baking_prefs, AlpineMountaineersIntl
you have voluntarily made yourself the birch among the ebony
> If you're especially paranoid you could even throw in a bunch of random preferences that don't affect your query but do throw off attempts to profile you
how would they not affect the query? they complement the query. or rather, unnecessarily accompany the query. your results depend on your input. it doesn't matter what colour glove you wear to pull the trigger if you bury the gun with the body
> write a script that salts every search with a few extra random preference lists, for privacy or just for fun
just the latter. fuzzing would be pointless since the engine will have already identified you by now
it sounds like an annoying browser extension at best. to label it a pro-privacy tool would be ludicrous