Sure, but I don't see why introduce this unnecessary complexity.

In most cases as a client you can pretty much

- for whoever you follow or are interested in, request data from any relay, whatever relay on Earth, you really don't care what relay

- for cases where you'll get data from people you don't know ("global feed", replies etc), request data from relays that enforce policies you agree with ("no posts without PoW", "all posts must contain the word 'soup'", "only posts from women", "posts must be manually approved" etc)