OMG I was FURIOUS! I was chopping yew trees for a challenge and decided to make a cup of coffee.. I wasn't wearing armor, didn't have a weapon on me, and just had a bunch of Signs of the Porter and woodcutting urns.. A bandosian NPC attacked and killed me. Thankfully the gravestone was extended so i was able to get most of my things back - but I had NO IDEA I could be attacked while skilling in non event areas. I finally looked it up on the RS WIKI - I had thought perhaps I logged into a PVP world or something - totally unexpected and I'm glad I made that coffee fast.