True that there is no obvious threat to having access to someone's foursquare account and the worst that could happen to someone is checkins at random joints th

True that there is no obvious threat to having access to someone's foursquare account and the worst that could happen to someone is checkins at random joints that could lead to embarrassment for some (viz. strip joints, certain clubs and so on). However, unfortunately, there are people out there who will probably have the same password for their Facebook/Twitter accounts and even email accounts. Those are the people at threat here.