@ilja @tek "only public posts are scraped" -- that's not entirely true. It also captures every follow, every block, etc. When you use a relay your database ingests a ton of garbage in it that exposes sensitive metadata/interactions between other people.
Followbots can only get public posts unless you DM it, and then of course "followers-only" (ActivityPub: "private") but that's basically public with a narrower scope but you've set yourself up for massive leakage of that data if you have a nontrivial amount of followers. It should really just be considered "public but can't boost".