Comment by dmitrygr

Do you also wish you could only get telephone calls from people using American made handsets, and that your email client asked you before receiving emails from other email clients, and that you couldn’t get SMS’s from other smartphone manufacturers without opting in one at a time?

Being able to reject spam , regions, specific people, specific topics, all makes sense. Wanting to approve/reject the program used to make the connection is a pretty useless way to segment communications - how will you determine “questionable” clients, and what when there’s a person you want to chat with and a person you don’t both using the same client?