I just listened to a podcast examining the Large Hadron Collider. Scientists are confident it's safe since the earth is bombarded constantly with the exact same type of effects...and we're still here. Of course, they explained further but most of it was over my head. I'm not worried. Do you know how many times in my lifetime there's been a threat to the safety of mankind? Let's see. Flu pandemic, killer bees, killer mosquitoes, avian flu, ebola, nuclear war, meteors, space junk, etc. Not to mention local threats of hurricanes, earthquakes, tornadoes and the like.
So, in the immortal words of Alfred E. Neuman I say, "What, me worry?"