VTBassMatt's Journal: Friends and Foes

I mark friends and foes on Slashdot mainly so I can apply some personal moderation modifiers to people whom I find insightful or people I agree/disagree with. Someone I marked as "foe" took the time to respond (insightfully) to my journal, and that's a big deal to me, so I changed my relationship to "friend" so I can see that user's writing in the future. How are other people using their friend/foe tags?