I’d say chances of getting busted are high as well. The invisibility of the window to common interview software won’t do anything mask candidates’ own suspicious behaviour.

I was doing a 45 minute screener interview with a guy the other day who I could see kept glancing over at another window or screen as he was typing in code. Every couple of characters or so he was pausing looking over, then he’d type a handful more characters, then pause and glance again. He was typing incredibly slowly as well, like a character or two per second, even when he was typing. It was honestly a bit of a weird experience to watch unfolding. His solutions were spot on though.

I didn’t make an issue of it, partly because I already had other concerns as well. I can’t think of a situation where there’s anything to gain by getting into an argument with a candidate: I simply didn’t invite him to the next interview stage.