The more I dig through kernel mailing list discussions, the more I think that we would do well to end the use of "NAK" entirely. It is an exercise of power that is hurtful to read and gets in the way of an actual discussion of how a patch needs to be improved. I have, in my maintainer role, never said "NAK" to a patch and plan to continue that way.

*Edited* since people are asking: NAK (or NACK) comes (I believe) from the ASCII negative-acknowledge character. In this context, is an abrupt way for a maintainer to reject a patch.