During the work day, you'd join is in Slack for 8 hours. You'd need to ask probing questions to mock-up our infrastructure and pitch a feature based on "how we work".
One could try to cheat on the first part, but there is no chance one could have bamboozled us during the work day.
For our technical writing positions we had some instances of outright plagiarism, but no instances of anyone trying to cheat the coding sample.
That's amazing! For everybody else that shares my amazement, I found https://www.compose.com/articles/how-compose-uses-interviewe... that touches on said hiring practice, but I'd love to hear more.
"Why did you do this part this way? Would you do it differently if requirement X were different?"
It's immediately obvious if they cheated. Better yet, that's a much better, more relevant discussion than most whiteboard problems.