I dont know about embarassing but having any screen nearby them run a live fact check of any lies they tell.
As for embarassing, live updates on the screen of last time: farted, picked nose, didnt wash hands, imagined someone naked (including just partially), didnt understand what they were just told, a little bit if of wee dripped out, tries to hide arousal/erection etc.

Would love to see someones ‘imagined someone naked’ counter reset when they are talking to the queen, or ‘tries to hide erection’ when holding hands with ivanka.

‘Stuff’.
No questions please.

Oh please do printer interface.