Presumably you'd be able to let your frustrations out and tell this thing to go get F***ed, and not get arrested for it, as you'd not be insulting an actual officer.
Fun!
How dare you... that machine is the best officer in the force!
If this is based on physiologic responses to questions, just take an anti-anxiety medication or get tipsy with a few shots of alcohol 1/2 hr before facing the machine and it will suppress a lot of cues.
The best way to trick the robot into thinking you're not bringing drugs over the border is to be on drugs when you cross over the border.
Robot: Are you carrying any unlicensed or illegal items, such as weapons, drugs, unchecked organic material, or unauthorized persons?
You: Yes
Robot: I have determined you are telling the truth; you may pass.