The mob is a huge problem with Twitter (and adjacent social media), and the issue with a mob is purely that of its size. It's the size that makes the mob, and everyone who has ever considered chiming in to add their voice why so-and-so was bad should stop to think about whether the world really needs that additional voice. Each individual voice may be perfectly right . So-and-so may really have done wrong. But did th…
There can be no mob without twitter's involvement.
There are always two parts to social media; social media the people at scale and social media the recommendation engine with impulse driven features that actively rank orders and promotes what content meets what eyes. By definition internet brings the scale, i.e. the size. But size in itself does not create a mob. You could walk around in a crowded square and mumble all the controversial things to yourself; people will at most give a bad stare, but mostly ignore you, a mob will not form after you.
It would take a shit-stirrer to actively salience the thing you said to the people in that crowd who would be most motivated to come after you.
Twitter et al are the shit-stirrers that makes money every time they can make a person engage with a content, regardless of the thoughtfulness or the sentiment of the engagement.