[pavel_lishin]

At least one employee would be to blame, right? Comcast's network hasn't become sentient, and isn't actively rebelling against human businesses by shutting down random ports. At some point, someone either made an explicit decision to do this, or decided to skimp on training.

[jarfil]

It could also be an endemic culture problem, where lots of people skimp on lots of tiny things to the point that the final performance goes down the drain. No one to blame, but everyone to blame.