After following a few links, I am now learning that there isn’t by default a notification sent to people having one of their post deleted !?? (even if no reason is given). Personally, I find it disrespectful towards them (let’s say it’s only my opinion).
Friction will be far higher when the users notice some of their posts have been deleted. And some will inevitably notice at one point. Then they will ask themselves how many posts have been deleted. They will get angry, and especially angry to not even have been informed. This is the moment where the supposed “friction” of friendly notices will appear in retrospect as a really good idea 