This is a humorous post. Do not take this seriously, unless you want to.

Share your impossible-to-implement solutions to the AI cheating problems on Codeforces here!

I had an idea that involving requiring usage of special applications that would record keystroke frequency, test whether it is running in a VM, or (with all the privacy problems it causes) monitor eye movements!

Well, this is almost impossible to implement, but what other fun ideas do you have?