Wouldn't then a hash of your email also identify you as a person? The companies can still build a profile of you if they just agree to use the same hashing function :/
Is it possible to rebind the caps lock key? That's the only reason why I have Karabiner-Elements installed, using the caps lock key for delete_forward is the best thing ever.
Remapping the caps lock key to the delete key (delete the character in front of the cursor) has been a great productivity boost for me. Below is the karabiner.json file that I'm using for this: