Having a game with 0 inaccuracies doesn't mean that the one who played the game is a cheater. Why? Because having 0 inaccuracies doesn't mean that the one who played the game always knew the BEST move. It means that the one who played the game didn't make any mistakes. So sometimes this person chose the second best move and it was still good enough to not be considered an inaccuracy. Maybe the name "inaccuracy" is misleading as players with games with 0 inaccuracies actually made slight mistakes.
Sorry if I wasted your time and you already knew this, but there are many players who don't know. Share this to those people. Maybe this can reduce random accusations.