>> If you don't want to participate, just tell the agent "I'd like to opt out". > I get to the front of the line, tell the lady "I'd like to opt out" Come on

>> If you don't want to participate, just tell the agent "I'd like to opt out". > I get to the front of the line, tell the lady "I'd like to opt out" Come on man, you're talking to humans that have a lot going on in their minds, including your security and everyone else's. They can't do perfect Bayes inference to figure out what's going on in your brain. What the heck are you opting out of? Democracy? Your marriage? Life itself? Realize none of those are positive indications of someone who's likely to be a safe traveler. Try to make things easier on them. Just saying "I'd like to opt out" with no added context on what you're opting out of is really following the instructions like a computer would. It makes you look like the programmer in those jokes who buys a dozen loaves of bread because he was told "buy a loaf of bread; if they have eggs, get a dozen".