There could be some highly specific situations where a two day exploding offer could be necessary for the business. That in itself doesn't make the offer unacceptable, and that also doesn't necessarily warrant a 'steer clear' warning for readers without more context. I wouldn't judge this company based on a single known two day exploding offer without further details.
If you had ever worked with me you'd know how protective I am of my candidates, sometimes to my own detriment financially. Companies pay the bills, but when they act poorly I don't defend them - I try to correct their bad behavior and explain to them why it will hurt them in the long run.
I would encourage any client that a policy of having all offers explode in 2 days would be bad from a PR perspective and probably result in losing good talent.
If it happened once, and the company had a strong business justification, I personally would not think that this singular action would reflect the company's overall business tactics. Again, it would have to be a good reason - perhaps one that even protects another candidate or current company employee.
