Please, do not take this in any offense or anything, I'm not trying to make fun of you or anything like that, I swear. It's just... some of the time, I cannot understand what you're saying at all. The words are all correctly spelt, but you've put the wrong words together in a fairly strange order. I'm guessing this is because your first language isn't english, and you don't know it that well? Again, I'm really not trying to offend, and I offer my sincerest apologies if you have been offended.
What I'm getting from your post is you're wanting to know something about a scenario where an NPC is at home, and the player comes inside and stares at them while they're working or whatever for an hour, at which point the NPC suddenly realises all of their things have been stolen and they (or maybe the player?) have been attacked, as well. I think you're asking if it'd be an effective way to fool the AI or something? Please correct me if I'm wrong.
Edit: Upon further consideration, I'm thinking you're actually talking about a situation where a player is playing an online game and their character in their house, or something, when the player needs to leave the computer unattended and tend to other serious business, or answer the phone or something, at which point, another player in that game goes into the character's house, watches the AFK character for a while, and (after realising the player must be AFK) decides to steal the AFK player's stuff and smack the AFK character around a little, after which, the first player comes back and finds, to his dismay, that his items have dissappeared and his character is half-dead.
I suppose that could happen if you're not careful, and I'm guessing BM aren't implementing any sort of AFK-immunity to online interactions, so you'd just have to make sure your stuff is securely locked away and log off if you're going AFK for some time, I guess? I'm really not sure what else you could do to prevent it.
