I dunno. It seemed to me that Karthik was reasonably explicit that such a blocking move is perfectly legal:
That’s a good point, and it’s one I promote far above any “need” to win. However, I also know the younger kids hate being crushed all the time by older kids, so I have to weigh the possibility they might give up in despair rather than do whatever they can and still feel relevant to a tournament, even with their lower-level abilities.