15 years ago, I brought back a suitcase full of pirated DVDs and knockoff purses. Most people are better off declaring uncontroversial minimums on declarations forms rather than naively being "too honest" because they're going to cause themselves and others no end of problems trying too hard to be "honest" while simultaneously incriminating themselves by filling out forms incorrectly by not using street smarts. Carrying ID and making the bureaucrat's job easier, where possible, will lead to smoother sailing for the traveler.