Why might a seemingly harmless comment cause a thorough search at the border, and how can you avoid this situation?

If you had to create your own values from zero, with no tradition, no society, no inherited beliefs, what would remain of you, and what would you choose to become?
Roads turned into rivers of ice and towns were blanketed in white across parts of Germany and France after hail storms and strong winds battered Europe. Apparently this is a sign of a heat wave?