5. It makes work more enjoyable.

People will hate their jobs if they have a strong desire to check in with Twitter, Facebook and YouTube during the day, but are blocked from doing so. If they're allowed to wander online, on the other hand, they'll be happier employees. And happy employees are productive employees.

6. It replaces bad slacking with good slacking.

If you think nobody ever wasted time at work before the Internet came along, well, you may also be interested in a bridge I'm selling on eBay.

People waste enormous amounts of time at work because of messy desks, inefficient processing of tasks, hallway chit-chat, long phone conversations and -- the mother of all time wasters -- meetings! All these activities look and even feel like work because they exhaust the mind and consume the hours.