Here's a good guide from WoW Insider on how to fear kite - not in PVP situations, but in PVE situations with a Warlock. You can use it to take down mobs of a much higher level than you!

Everyone talks about fear being overpowered in PvP, but that's not a discussion we're going to have today No, here we're going to talk about using Fear in PvE situations, where it can easily be just as useful. The main reason for this is that Fear in PvE isn't on diminishing returns. You can cast it until you run out of mana (though it costs 12% of your base mana per cast), and your target will never become immune. Compare this to Fear in PvP, where your target will become immune on your forth attempt to fear it. And while it has a chance of breaking on damage in both PvE and PvP, its maximum duration in PvE is twice as long as its PvP duration (at least it will be as of patch 2.2).