Fair point! Usually in online chess, it auto-draws the game. I guess there's an assumption that that's what the players want / not running out of time in blitz games.
There is a little known rule in tournament chess that if a position is reached 5 times, an arbiter can step in and rule the game as a draw without a claim. Usually only comes up in scholastic tournaments and very rarely in blitz tournaments.
Do you happen to know if this can be applied even several rounds later, in a swiss format? In most tournaments, even if there are score sheets, the arbiters rarely look over the game if the players agree on the result. And sometimes I don't look over my own games until a few days later if I'm disgusted enough with how I played...