Worried about who has access to your Mac and its files? While there are several software solutions to this conundrum, here's a novel, potentially fool-proof hardware answer. WARNING: performing this on your MacBook will VOID THE WARRANTY. DO NOT ATTEMPT THIS unless you have an exceptionally steady hand and a very high "geek quotient."

That said, click on any of the images to get a better look, if necessary.

STEP 1: Cut a hole in the casing on the right as shown below. A high-speed precision drill like a "Dremel," using a cutting attachment, is best for this task.

Check out the Full Article for the rest of the procedure!