Hell, this site is mostly anonymous, and there are things I won't say about....well, let me just stop there.
She may have shown some poor judgement, but statistically, she is almost certainly correct. Some not insignificant number of her students will commit crimes - become criminals.
As others have pointed out, virtually all of us are criminals in our big-government socialist state. There are so many laws on the books I'm sure we're unknowingly violating some. I know I will probably drift a few mph above the speed limit on the way to work. I will be listening to music played from a device that, well, I'm sure the RIAA or some such would claim stretches the bounds of "fair use." etc. etc.