[nenaoki]

It'd be especially great for a hip and cool corporation with a burgeoning browser to automatically set that header all the time, helping ensure nobody actually listens to it.

[yjftsjthsd-h]

If the DNT header is absent by default, websites were happy to assume that it was okay to track users.

If the DNT header were set to "no" by default, websites would be happy to track users.

If the DNT header were set to "yes" by default, websites screamed bloody murder and pretended that it didn't represent user choice.

[LinAGKar]

Thus, it needs to be backed by regulation in order to actually work