…Another perspective is that it’s essentially an anti-SEO technique: you want to discuss someone/something without calling the attention of people who are outside the conversation who might jump in and derail it. That’s less of an issue on Mastodon where full-text search is typically not allowed, but it also allows for wordplay and showing disdain.
https://www.wired.com/story/voldemorting-ultimate-seo-diss-resident-linguist/