In every country I've visited it's known your flight number, know your hotel address, know your return date, and if anyone asks, you are just visiting. Getting into specifics just invites more and more questions.
It's very true. There's a reason that, when your Miranda rights are read upon a rest, they say "...anything you say can and will be used against you.."
I'll leave it up to the viewer to judge this video with a defense attorney talking about why it's never good to talk to the Police: http://www.youtube.com/watch?v=6wXkI4t7nuc
(48mins in length)
There are now also agreements between some european countries that you don't have to drop your previous nationality when you adopt a new nationality. So I should get three nationalities in a few months.