Beef? Not beef? A question for the lawyers concerning the content of Taco Bell's crunchy tacos is now up to your taste buds to decide. While it's not a nonsensical quad steak burrito (how many kinds of steak are there?), Taco Bell is offering a free taco if you like its Facebook fan page. Are you willing to take a leap of beef faith and be the chain's 5,671,863rd fan?