Well, okay, there is a limitation to generating X-rays using this method. Scotch tape only produces X-rays when peeled in a vacuum. This means that unless you have a vacuum chamber set up at your house, you will not get any X-ray exposure from peeling Scotch tape. So fear not, Christmas shoppers; you can now breathe a huge sigh of relief. Of course some of you (...cough, cough, Greenpeace members!..cough, cough) are still going to be boycotting Scotch tape after reading this anyway because of the paranoia surrounding radiation.
I should have posted this earlier, like on Halloween. Oddly enough, this was known for quite some time by Soviet researchers, but it sort of got lost in the shuffle. The interesting thing is, that this might have some useful scientific applications such as building disposable X-ray machines.