@risottobias if you have your own domain this is even easier. I used to do it more diligently but after 10+ years of it I never experienced a single instance of an email address being used inappropriately. If an address starts to get spam you would know where it came from but that doesn't do anything to stop the spam. And the other data about you the breached company has is probably more valuable and there is nothing you can do about that.