Granted, most people use Facebook, Twitter, Google+, etc. for personal reasons. But even though it might be a personal account, be wary of who is watching when you use social media as a platform for your political opinions.
Do you have bosses and coworkers on your friends list? Are people at work following you on Twitter? Even though you might post your political rants from the privacy of your own home while you're off the clock, you still have to come face-to-face with potentially irritated coworkers and managers the next morning. So either ramp up those privacy settings or think long and hard about whether your love/disdain for a specific candidate is worth the aggravation it might cause for 40 hours a week.