[404mm]

This lacks the easy control over blocking the “aliases” you’re done with. The real pro tip is to use this domain with something like addy.io (paid or self-hosted) where you can either pre-create the aliases or have them dynamically created for you as they become used for the first time - and having control over each of them so you can block it when you want.

[jonotime]

I have never had to do this in my years of using this scheme. And if I did, I would create an email filter. Which I consider to be more standard and scalable then managing a bunch of individual aliases.