actually sharing is an offense to k2, and if u think about it, what happend if u got a friend with an acc with lots of stuff, then u ask him to give that to u and u tell ur friend to send a CS ticket and ur friend says that he got hacked, k2 restore then and u got shitloads of items, if more ppl do that, k2 will broke or the game would be so unbalanced.
sharing shouldnt be penalized, but shouldnt be abused either, xping to lvl 80 is hard and boring as hell, and if k2 really tracks the accounts and items on them they should know which items are duper, or illegaly obtained and which not.
sharing is risky but at the same time is a nice way to enjoy the game and have a nice lvled character.
edit: the bad thing of this is that is shared users dont get help from custtomer support, then why they should play the game and invest time, effort and money. i think shared accounts should get some kind of tracking... hard to do but it would be a nice way to incentivate players to keep playing with a nice support.
too bad is k2...money moves the world anyway