Well... it all started while i was making my rooftop-garden, when a player named 3x3L suddenly walked into my house...
he stood (it seemed that he's idle to me) for a few minutes, not chatting and ignoring my "hi" attempts...
then, as suddenly as he went into my house, he was gone.
when he left, i opened my chest to take out some wood, but, omg! it's all stolen!
i had some diamond equipment, iron ore, gold ore, compass, some iron bars, a lot of wood, a bow, feathers, some arrows, some flint too, almost a full stack of seeds, some tree seeds (or young trees.. the stuff you can plant), some wool cloth and a few stacks of cobble and dirt.. all gone!
and my chest had a password! i set the pass right after yotta helped me out with a bugg on my other chest.
when i started blaming him for stealing, he actually admitted doing it! and laughed at me all the time!
here's the screed of him admitting:
http://img204.imageshack.us/i/80089360.png/
now i am 99% certain that there's no rule saying "In Kiwike, you can barge in other people's houses, guess their password and steal all their items!"