I’m not sure I understand your second paragraph, Animiral. Take this game for example. After move 289, White passed, but White still owes me a move around G15. I was filling liberties to force White to defend, but White passed 3 times instead and the anti-stalling feature triggered. Without the feature, maybe there was 20% chance of a reversal but now it’s 0%. In some sense, OGS gets it backwards in this game: the “staller” is the player who repeatedly refuses to defend, not the one filling dame!
In my view, filling dames should not be considered stalling. As richyfourtytwo said, this can be detected by calling the AI with the Chinese rules. The load on the AI would be greater as it would need to be called repeatedly in a “dispute”.