Physical Danger
If you're as politically outspoken as our friend Dr. Chomsky, you just might get a brick or two heaved through your window…but let's be real here. You probably don't have anything to worry about.
Of course there are the usual potential risks of travel (and the flip side of having a job that doesn't make you exercise much), but you can pretty much rest assured that you're not going to get sent home from your linguist school nursing any injuries.
If you're reading this because you are seeking the thrill of risking your life as a linguist, you could either become a translator during wartime, or just take up jai alai in your free time like everybody else.