3000$ laptop, are you crazy?! Mine is less than half that price, that is new. Get a linux netbook for half the price of a cell phone if that's a concern.
Nobody steals anything from Russians on the subway because some Russians carry guns :)
Sorry, looks like you replied before I edited down my comment. I mentioned $3000 laptops (and how unwise it is to pull one out); Occasionally I see a tourist with:
* A MacBook Pro balanced precariously on their lap.
* Sitting right next to the door.
* ... where someone could simply snatch the laptop and bolt out the doors just before they close.
Nobody steals anything from Russians on the subway because some Russians carry guns :)