alt Hacker News> The alias emails look weird enough I'm guessing you could ban them with few false positives.
While this is true not all of them been weird. Some can be just word + number + word without dots or underscores.
Also blanket banning whole domains is just much easier and already done for temporary emails. No false positives.
The point of the article is previously banning Apple's temp domain would create many false positives (all the normal Apple registered emails that chose @icloud.com during setup)