relax brohams. y'all are totally over reacting. if i had lost it i would go back to that class and tell the professor what happened. then he could ask the next class if anyone had seen it. or, i would put up posters asking about it. I'm saying all that is his responsibility not mine. and if i do see a poster, or my professor does make an announcement, guess what? he's getting it back. if he doesnt even try to get it back? well finders keepers.
you keep saying "it's his responsibility not mine" but you still haven't explained why it was cool for you to take it from the room. the
obvious thing to do would have been to leave it since that person could easily come back in even the next half hour or less looking for it. now you've removed it from the place he'd be the most likely to check first, and caused a much bigger problem. it's YOUR responsibility as a human being to not make this whole process a lot harder. since YOU were the one who fucked up and took it, the only adult thing to do would be to return it to the professor and put it in their care.
i mean really what do you think is going to happen if the professor DOES go "has anyone seen this zune??" and you go "YES IT'S ME I TOOK IT", everyone's gonna think you're an asshole anyway you're a lot more likely to avoid this if you go just SLIGHTLY out of your way to find the owner, it'll show you're a fucking adult
ughgh man how many times do you have to say it's not your responsibility before it sinks in that you also had no excuse for
actually taking it