Suffice to say, this makes me very hesitant to connect a USB-C phone (which I don't have, thankfully) to a laptop USB-C charger, because even though they /should/ negotiate the correct voltage, the idea of a bug in the implementation causing the charger to fry my phone, perhaps even setting it on fire in the process, isn't worth the risk.
As others note, the poor implementations wind up causing us to use only the adapters shipped with the device in the first place, which is actually a worse situation than with standard USB - right now, I know that I can plug a device into any USB charger and get 5 volts. Amperage may vary considerably, but unless the adapter is a real lemon (and yes, I know those exist), it's not going to kill my phone or burn my house down if I don't get the planetary alignment of adapter, cable and device right.
