var123, there were students who cheated in 1984
there were students who didn't give a damn about a good education as long as they got a piece of paper
why else did we have invigilators and supervised loo breaks and all bags to be put away on entering the exam room?
they were a tiny minority and so are the students who cheat today
but given the enormous quantity of students at universities these days, and the relative global uniformity of university courses, that tiny minority might just be enough to make it worth somebody's while to set up an internet site for cheating: particularly as that doesn't take much in terms of investment
ime a student who has been lifting extracts out of other works can usually be spotted through the change of style or thinking without the need to resort to turnitin: after all, the students who do this sort of thing are not the greatest writers, and if you suddenly find a coherent sentence in their essays it is often worthwhile checking where that came from...
if you suspect it, then you call them in for a gentle discussion and then either do or do not take it further according to university guidelines
ime they typically fall into two groups:
a) the ones who have simply been sloppy about their note-keeping and ended up mixing their own thoughts with reading notes/lecture notes in the same file
b) the ones who are at breaking point because of stress/ill health/inability to cope with the course and have used this as a desperate last resort. Very rarely do you see the completely immoral chancers: I may have met one or two of those over the last 7 or 8 years.