flamingos-cant

Just throw in a zero width space and really throw people off.

You can also just insert arbitrary strings into the local_site_url_blocklist table as Lemmy only checks the validity of the URLs when editing the site through the API. This has the advantage of preventing the messages even getting written to the DB. Example:

insert into local_site_url_blocklist (url) values ('Hi, I''m Nicole! But you can call me the Fediverse Chick :D');