Re:Sign In with Apple [video]
by kevin_thibedeau on Friday June 07, 2019 @05:33PM
(#20128825)
When someone starts forwarding illegal content via these accounts the feds will ensure that the recipients are disclosed.
They don't need to record what app or service got the alias address, and they explicitly state that they do not record any details about interaction with your service, or any emails that go through the alias. It's an explicit statement in the linked talk.