Yes for those in group B I'd suspect many were doing exactly what these cheaters in group A were doing - submitting the unaltered output of an LLM as their review.
The rejection is based on the dishonesty of explicitly committing to standard A and then knowingly violating it, not on LLM use as such. I think that's pretty fair, considering that everyone could have just chosen B if they wanted to.
Sure, I'm just pointing out that the 2% headline figure is very conservative if not misleading as a far greater unknown number in group B will have done exactly the same (which I doubt ICML or those submitting papers actually want). This is probably a first step in clamping down on anyone doing this.
