there are understandable concerns: most fediverse server software will respect "delete" requests of one form or another. if i signed up expecting that servers would at least try to delete content, and then i found out my content was being scraped and cached somewhere else that has no intent of respecting the delete requests, that would irk me. i also just dislike reposter bots in general, since it commonly seems like it's spam, with no interaction from the original poster anyway.