Nothing. Word is getting around about how to do this. I anticipate that in another couple of years it'll have diffused to everyone, except the constant crew of new younglings who have to find out and be told about it from their older siblings and such.
"AI detection" wasn't even a solution in the short term and it won't be going forward. Take-home essays are dead, the teachers are collectively just hoping some superhero will swoop in and somehow save them. Sometimes such a thing is possible, but it isn't going to happen this time.
Yes. The ship has sailed and in fact it sailed away many, many years ago. Modernity now has to reckon with Brandolini's law at the scale of these AI systems, which, depending on the system you're inside of, can vary from "this is easy to refute" to "don't bother, assume it's all bullshit."
"AI detection" wasn't even a solution in the short term and it won't be going forward. Take-home essays are dead, the teachers are collectively just hoping some superhero will swoop in and somehow save them. Sometimes such a thing is possible, but it isn't going to happen this time.