Yeah I did try them out before and GPTzero gives out false positives pretty frequently even saying that my past essays are AI generated even tho I wrote it myself and for GPT 2, it can be easily bypassed by rephrasing a few areas. As for asking students to explain the content in the essay, can't they just read and understand what chatGPT generated before submitting them? I think using these detectors can do more harm than good especially given the amount of false positives they give. But I guess students who use chatGPT to cheat are the types that are too lazy to proofread them so there's that.