I'd like to know if there's an official rule (or a tweet for a game developer) that can back this up?
Specifically, I'm trying to evaluate the consequences of disarming weak creatures. Would a disarmed kobold with a -2 STR modifier do 1 (1-2; minimum 1) or 0 damage (1-2; minimum 0) with an unarmed strike?
On a hit, an unarmed strike deals bludgeoning damage equal to 1 + your Strength modifier. (PHB, p. 195)