Tim
If .com was *only* ever used for commerical use, and using .com was enforced for commercial use, and we had something else for personal use, we could blanket delete all .com originating mail, and still receive all our non .com mail from our personal friends. ;-)
Several years ago, I concocted the notion of '.per' addresses (for 'person'). I searched for someone to tell, but didn't know enough then to know where to look.
I figured that we needed something for personal domains (e.g. websites, where a person buys a name).