That won't stop contacts that now know your phone number from swapping you anyway to compromise other services that use SMS for 2FA. My whole point is revealin

That won't stop contacts that now know your phone number from swapping you anyway to compromise other services that use SMS for 2FA. My whole point is revealing cell numbers you rely on to strangers is a bad call. Being forced to do it by baking them into a chat protocol is idiotic.