nowhere to hide

Well, only Denmark, Norway, the United States, the Republic of Ireland and Iceland.

Wikipedia: Countries without compulsory identity cards

Australia ('citizenship certificate'), Austria, Canada ('Certificate of Canadian Citizenship'), Finland, France, Japan, the Netherlands, Sweden (from 1 October 2005), and Switzerland have non-compulsory identity cards.

Denmark, Norway, the United States, the Republic of Ireland and Iceland have no official national identity cards.