If I remember his earlier comments on this correctly, he's probably referring to blocked users being unable to see your public tweets, and changing it so it only keeps you from seeing the blocked user. I think. It's impossible to predict a mind as great as Elon's though.
There was also one called something like "How Not to Summon a Demon Lord" where two women use a spell that's supposed to make the protagonist their slave but it gets reversed and they become his slaves.