Doing so head-on solves the problem faster. Talking directly to someone or about the problem as it is has felt to me like people can understand and act quicker. Less malcontent is felt by those affected by such a person's incompetence.

Capturing the subtleties in such a black/white call-out usually is lost though to the reader/listener. It also doesn't lend to this to do this so publically, for the entire internet.