Do you think TV shows such as C.S.I. teach people how to commit a better crime?

Yes, BUT they also provide an even smarter way of solving the case and bringing the guilty criminal to justice. So people should focus less on the fact on how "well" these crimes are planned (Honestly, how many criminals in real life can actually think of a good plan? They're all idiots!) and more on the fact that no matter how good you are you WILL get caught.. C.S.I. or not, you WILL get caught..

absolutely right. these crime series entertain not only us but also the criminals to plan better.