[crote]

The device first negotiates a certain current capability. If a device explicitly asks for 15W and then goes on to draw 60W, you can hardly call it a "random" shutdown: it is clearly misbehaving, so it is best to shut it down to prevent further damage.

[izacus]

Again, how's that better than having a clear standard which ensures that the devices you buy are conformant from the get go?

[lazide]

There is no device standard which can ensure the existing networking cabling isn’t damaged or subtly out of spec.