The one thing I totally, unreservedly like about Bluesky over Mastodon is that on Bluesky it's possible to put your account in a state where your screen name shows as ⚠Invalid Handle and also your address shows as ⚠Invalid Handle and it's impossible for anyone to @ you or even figure out who you are without specialized tools. This has been an issue with the Bluesky frontend and all its forks since day one, and they've never taken the least steps to fix it. I just think that's delightful