Ditto German Star's comments. I recall 20 some years ago an article in one of the higher education journals that aprox. 90% of business majors, 50% of social science majors, and 30% of sci/math/eng majors admitted to cheating on exams. I remember thinking 'who would admit to such a shameful thing if they did it, and how many cheated but didn't admit it to the interviewers?' I also wondered what this would mean to the future of our society.
When I was an undergrad you couldn't use a Chem/Physics slide rule in some classes as it was considered an unfair advantage.
!! Later in life when I was teaching undergrad and grad students in the sciences, I watched them using Scientific calculators, often with little 'feel' for a correct answer. (One student with a faulty calculator wrote down Killograms of end product reported as an answer to questions which used fractional milligrams of raw materials! No thinking, just write down what the display showed.)
Cheating didn't seem to happen much in my smaller lectures. Mostly it was in the 100-300 student classes, where we used to spend as much effort securing our tests from office break ins, and making up multiple copies of exams with questions arranged in different orders for random handout to students.
I recall one student who turned in his blue book and exam sheet and sat down again until after the exam was over. He then told me he had noticed several students copying off of his answer sheet, so he began writing in wrong answers because he 'hated cheats'. He asked if he could re-do the test immediately, which he did, pulling his usual near perfect score. Three other students, however, turned in duplicates of his first exam, and I failed them for the test. Unfortunately, the admin of the University was reluctant to discipline them for cheating because of the potential for lawsuits by irate parents and the possible publicity.
They never understood that they eventually pay a price for cheating, because they never really learned the material, and it would eventually come back and bite them!