Assuming blocks themselves are never childish. Jordan Peterson is on the list and he doesn't even use the site: https://bsky.app/profile/jordanbpeterson.bsky.social
But let's be real: Jordan B. Peterson on Bluesky is not going to be a different Jordan B. Peterson than he is anywhere else. If you don't want to interact with Jordan B. Peterson on e.g. Twitter, then you probably don't want to interact with him on Bluesky either.
However, feels virtue signal like to block someone that isn't there. Might as well block "random jerk." What is the value of blocking people by name that may not exist?
For public discourse, I wonder what the right level of agreeable "echo-chambering" is.