If you want to have a private conversaion, social media doesn't seem to be a good vehicle for it. Much like airing your dirty laundry in the town square has been considered bad etiquette, airing personal greivances on the internet seems to be in poor taste.
It must be noted that manners never arise sponaniously in culture, but becuase people fear the consequences of breaching etiquette. I for one welcome the return of politeness to society.
Remember “Don’t ask don’t tell?”
The truth is that what is generally accepted today will be guaranteed to not be the same exact things that are generally accepted tomorrow.
Society moves from being more liberal back to more conservative through culture. Punishing people for straying outside lines when they are not causing specific harm to others eliminates the very method by which societies evolve.
What you are describing has lead to the stagnation and ultimately death of many cultures and societies.