I was an IA for a computer security class. We discovered a number of students cheating by copying answers from a public github repo from the previous semester. We noticed because many students were submitting the same bizarrely wrong answer. Some students had even copied all the typos.
Even crazier, a number of the students had even forked the github repo with their github accounts. That is some terrible opsec. Definitely losing points for that.
I have noticed that these things matter only when someone has been burnt by it once already. So before your class, nobody in their life had even bothered to check for plagiarism.
Had to fail the projects of 1/3 of the class in a community college because of plagiarism. Although to their credit, they at least put in some effort by shifting sentences around and re-drew other students' diagrams. They did keep the same node names and relationships between nodes, though.
Even crazier, a number of the students had even forked the github repo with their github accounts. That is some terrible opsec. Definitely losing points for that.