If you go to UP and invis con a Fallen Solidger (or how ever yeh spell it) they are indiff when yeh are invisd. i think there might be more if you need to Comb Norrath for the proof, (figured out the Fallen Solidger thing from hunting Elys for Druid armor)
Baroness Wolvesoul Silver'shadow Preserver of Tunare <Flames of Zek>