I don't know if this article segment has been posted here yet, but if it hasn't, take a look at this article I read on LiveScience:
CERN spokesman and former research physicist James Gillies also pointed out that Earth is bathed with cosmic rays powerful enough to create black holes all the time, and the planet hasn't been destroyed yet.
I read a similar piece on Wikipedia.
That blog that said the world is going to end is complete bullsh*t. Get on with your lives, people.
EDIT: Referring to the fact that supernovas create black holes: Although black holes created by supernovas are huge, well, the supernovas are huge on their own. A particle collision creating a black hole just as powerful? Pfft. Yeah right.
Be serious... I have Asperger's syndrome (yes... that means I'm actually somewhat autistic
), which means I can't catch on to certain things as easily, so I stupidly thought this was actually going to happen until I decided to go check some articles about it. I felt like I was about to faint, believe it or not.