Or anyone he considers his enemy/detractor. Anyone who has ever exchanged words with Elon, or even looked him the wrong way better have deleted their DMs - and asked their counter-parties to do the same - before Musk walked in the door at Twitter HQ. Let that sink in.
deleted dms likely mean nothing, they probably just get marked in the db as 'deleted' and not displayed on normal clients... but to the elon/admin client no such restrictions
