So in a sort of "phone can be rendered useless if stolen" kind of a way, why can't IG (etc) lock an account (perhaps with a message on the page of the username,

So in a sort of "phone can be rendered useless if stolen" kind of a way, why can't IG (etc) lock an account (perhaps with a message on the page of the username, based on an irreversible flag on a user account?) that says something like "this account cannot be transferred" with a help link that explains the account will be killed if the email address changes (perhaps without submitting a passport or something to prove it's changing for the same person). Would we then be at a point where this kind of swatting is pointless? Even if you got the name via harassment the system would kill it? I've though about this for about 15 seconds, but you get my point.