There is no simpler lesson than "don't install unexpected software on your users machines". So simple. So obvious. So necessary, if you value privacy. Yet the

There is no simpler lesson than "don't install unexpected software on your users machines". So simple. So obvious. So necessary, if you value privacy. Yet they have not acknowledged the mistake or shown any signs of willing to listen to the complaints - their entire explanation is about something else that people weren't even aware of! Given the level of feedback and the intelligence of the recipients, this is unlikely to be a mistake or a coincidence. It is reasonable to conclude they fully intend to repeat this behaviour in future.