firstname.lastname@gmail.com can have similar problems. Somehow people miscommunicate or misremember their email address and I get a lot of misdirected messages.
Also, my daughter has firstname.lastname@gmail.com and there is another lady with the address firstnname.lastname@gmail.com (yes, a typo in her first name, duplicating one of the letters) and of course she keep receiving her emails and vice versa. Same solution - they mutually agreed to forward messages to the right person and delete them afterwards.
First world problems...
I often see repeated attempts to create accounts without reconsidering the email address, and sometimes they succeed (I received repeated invoices for Sky and for an insurance, not to mention occasional ones).