I'm going to answer your question despite you saying you won't engage but: You can't justify objecting to punishing someone for doing something technically not forbidden by the rules because there was no rule against at the time without also justifying the punishment if there's no rule against the punishment.

eg "You can't punish x for crime y because y isn't actually against the rules" but "Punishing x for crime y" isn't against the rules either. So either you want there to be outside of the rules systems for what people can and cannot do or not.

The same goes for my stress argument, it was mostly just turning your own argument around. Downvotes are SUPPOSED to be unpleasant. making a bad comment that gets downvoted should make you feel bad about making a bad comment. Good comments getting downvoted because you made a bad comment corrupts that system.

Spammy no value posters get downvoted plenty without mass downvoting campaigns.