pick pocket mechanics

[Aabdel]

So I've been playing a rogue up to 11 and have raising my pick pocket skill wherever I can (with the exception of in groups, unless granted permission), and was wondering if anyone could give me a summary of the mobs that actually are pickable? It seems most humanoids are pickable but then no undead, but then I can pick willowisps, which makes no sense to me. Also I've read that giants are not pickable on this server?