Google (and others) should support hashing/obfuscation the unique part, for example john@gmail.com -> (some unique symbol to denote hash, say +)(hash)@gmail.co

Google (and others) should support hashing/obfuscation the unique part, for example john@gmail.com -> (some unique symbol to denote hash, say +)(hash)@gmail.com It wouldn't be complicated for them to implement, and give everyone a few such aliases.