I have been known to change formulas that were written on desks before my tests. Change a “-” to a “+”, a “3” to an “8” and so on.
But that sort of stuff is so much harder in a digital age.
ACCESSING your site during a test is against the rules, regardless of what’s on the site.
Kids in my high school cannot leave a room during an exam. And having a phone in their possession is an automatic transgression of testing policy, and a 0 on the exam. From there, it’s basically solid proctoring.
But once you let kids out of a room during the exam, all bets are off.