'Stalker' tools that fill you in on your friends' whereabouts & activities
Implications - Social media and special mobile apps have changed the way consumers interact with friends. But status updates on Facebook and Twitter are one thing; tools that actually help you track your friends' whereabouts and activities -- and help you find them -- are another thing entirely. These "stalker"-esque innovations mean you'll never be wondering where your friends are ever again, whether you've lost them in a crowd or they've dodged all your phone calls.
