yeah just echoing what LeninWeave said, the threat model for this kind of thing is almost always random weirdos vs state actors, be they reactionaries who lurk this site or just disgruntled people with a grudge. someone dedicated enough could dig up the deleted stuff, true, but types like this are often not that driven or resourceful. just creating a barrier that makes them lose interest early in the process can very often be enough. definitely agree about different usernames!