Lurting, as you can see in the video above, is a made-up term for looting during battle. Sometimes, we can't help it (yes, I'm a sometime lurter, too, I'm sorry to say)-- the thrill of seeing shiny sparkles on a foe is just too much. But while it seems like it won't matter, odds are that that's when things will go wrong-- looting not only distracts you from the fighting, but also can cause exactly what happens in this video. If a loot window pops up while you're trying to keep the main tank healed. And it's a distraction that could cost the whole group.
In short, no looting during combat: no lurting allowed. That loot ain't going anywhere, and it's got your name all over it. Wait until all the sheeps are dead, and all the targets are down, and then right click away and claim your goodies.