Admins can deal with it on their own instances very easily with 1 button that purges all content but for it to federate everywhere the source of the account or where the comments are posted needs to deal with it

e.g. I can purge all of the comments locally from programming.dev using one button which will get the ones posted on programming.dev for other instances and posted on other instances for only p.d users and then ban them so they dont post anymore. But for all instances to have that done blahaj needs to do it. Anything other than that would mean moderation overreach with other instances where someone on a 1 person instance can ban people that shouldnt be banned and it federates