To be fair, sometimes things happen, and it can be good (I think JP said something like that). something like "never interrupt your enemy when they are making a mistake" - if people demonstrate their shittiness, help them.

It would just be your friend that got an (admittedly mandatory) wake-up call - other employees would too. The best remedy is just a totally neutral post/tweet detailing what happened, with no judgement at all - 3rd parties will get angry on your behalf, and a lack of initial anger will only motivate that moreso.