I was linked this article from Facebook, written by Quincy Larson on February 14, 2017, that points out several security vulnerabilities you and your devices may be exposed of during air travels. These vulnerable devices may include your smart-phone, laptop and possibly even your Amazon Kindle.
I would highly recommend you take some time to read it, if you want to know more about the severity of giving up your privacy.
Even if you did nothing wrong, you do not have to give up your privacy to prove it.
Keep your personal data to yourself, so it can never be used against you.