Maximum PC: Time is of the essence, and now that we're into December, it's time to get serious about holiday shopping. To get started, you can find a whole bunch of great gift ideas in our "Geek Holiday Gift Guide 2012," which we've broken up into several categories. It's not an all-inclusive list, however, and to help make sure you or your gift recipients won't have to fly off the handle like Griswold did, we've put together a gallery of tech items you should avoid like the bubonic plague. (Gadgets, Gift Guide, PC, PC hardware, Smartphone, Software)