NY Times has an article on undergraduates cheating in their courses. I guess I'm not "with it" because I had never heard of some of these websites that "help" students complete their assignments. Cramster and Course Hero were mentioned, so I went and checked it out. At Cramster, there was a place holder for the textbook I was using, but no solutions were available. At Course Hero, there were no solutions available to courses from my discipline. I imagine with time that these things will change.
Do you care if your students cheat on homeworks? I am ambivalent about HW cheating because it is such a small portion of the grade. However, if I caught cheating on HW, I would turn it in.
Do you care if your students cheat on tests? Here, I care very much. My exams are open book and open notes, so to cheat would require students communicating with one another during an exam. Not cool. There, I would turn it in, too.
I've only taught 13 students in the last two years, and none have cheated. My next course will likely have 70+ students, so I'll have to keep my eyes open.