The outcomes for people who were never charged or convicted of any crimes seems pretty...brutal. Having your livelihood taken away among other sanctions over an allegation would be very upsetting. It seems a safe bet that in an arbitrary amount of time(say, 36 months), this will happen to the "wrong" person - the sort of person who gets upset and kills people they believe(whether right or wrong) to be responsible.
I don't think that would change anything though, other than further vilifying the person - if they weren't a legitimate bad actor before, they would have become one. The social pressure to ostracize someone who is already being ostracized by the majority is a real pressure that affects people.
Managers who bow to Twitter pressure and fire people are more of a problem than the Twitter mob. The twitter mob is the indirect cause, the boss is the direct cause of someone being fired.
I don't think that would change anything though, other than further vilifying the person - if they weren't a legitimate bad actor before, they would have become one. The social pressure to ostracize someone who is already being ostracized by the majority is a real pressure that affects people.