Are we surprised? Not at all... this is an ethical problem, this is a legal risk. The alternatives will hopefully know better.

Interesting reverse engineering job of Copilot's client side to have a better idea at which information it actually feeds to the model. A couple of funny tricks to prepare the prompt are involved. Obviously some telemetry involved as well, again with interesting heuristics to try to figure out if the user kept the suggestion or not.

Alright, this going to be interesting. Pass me the pop corn. It's definitely a welcome move in any case.

Indeed, this is going to be "interesting" in educational situations... I guess that'll at least push into richer assignments.