It would not be very hard. But what about cost of implementation? Who in the right mind would pay to implement that type of system for the thousands of users of BTC-E?
Sorry, I meant only for the alarm to notify the site owner so that they can suspend trading, back up the database, take the site offline or whatever. More than once, bad stuff has happened while owners are asleep and no-one's been able to contact them to let them know strange shit is happening. In the physical business world, there's usually a system in place for businesses to be contacted if they're broken into out of hours.
I agree. Every exchange and Bitcoin holder should implement and build something to this sort.