(this isn't about any specific person or event)
Publicly calling someone out has huge social costs for everyone involved, including for the community as a whole. This isn't to say that you should never do it, I've done it, but it's not as simple as "I'll call this person out for doing [bad thing] and the community will be better for it and it'll fix my problem with them."
This means that any community where people feel like they have to call out every bad interaction will implode.
Also: Subtooting is REALLY BAD! It creates an environment of fear and uncertainty, and a thing that seems to be happening on Mastodon is that different incidents get subtooted at the same time and wires get crossed and they collide into a sort of blob. They breed mistrust and in/out-group because when someone subtoots, it's impossible to evaluate whether their grievance makes sense to you unless you already know all the details. Just don't do it.
@bruno I musta missed this... what's a "subtoot"?
@bruno ...What's a "subtweet"? Do I need to go to Urban Dictionary for this?
@bruno Urban dictionary never disappoints: http://www.urbandictionary.com/define.php?term=Subtweet
@ocdtrekkie Talking about someone in a tweet ambiguously, without @-ing them or even mentioning them by name.
@ocdtrekkie The UrbanDictionary definition is a little out of date, nowadays "subtweeting" most often means talking about someone without naming names, usually in a negative light
@ocdtrekkie Like a subtweet, but on Mastodon.