They did it previously, in Chechnya, in Debaltsevo. No one did anything, besides "seriously concerned of reports".
It's also likely the reason the Russian advance stalled. Neither party really wants to go through that hell
Unless they expected a surrender ( which seems to be the case - they had advanced paratroop drops and logistics and rations drastically unprepared for a longer term battle,potentially with the help of special ops murdering Zelensky), why even go there then? Nobody sane starts a war with the idea of long term destructive urban fighting. Especially live streamed urban fighting. There's nothing for Russia to win there, so if that was really their plan, it's even stupider.
Then the blame should be on who started the "warfare".