Do You Kern Your Headlines?

At least a handful of times this week I've run across a forum or a blog posting lamenting the lack of kerning in an otherwise good newsletter, book cover, or display ad. It's probably just coincidence that I encountered all these comments at once. Or is it? Perhaps there is an epidemic of unkerned type going around. Have people forgotten how to kern or do they just don't think it matters? Do you know how to use Kerning and Tracking?