Let me clarify a few things.
1) Yes I was serious.
2) I wouldn't advise acting similarly in the U.S. Working for the DHS requires the lowest IQ of any job which allows you to carry a gun.
3) No, you will not get in trouble doing this unless you have dark colored skin or come from a poor country.
4) Japan has a long history (which continues) of official racism and disrespect for civil liberties, which if it didn't exist would make me more likely to adhere more closely to the rules.
5) Unthinking bureaucracies which abuse individual rights should be resisted.
6) The customs and immigration forms for Japan are ambiguous. They don't specifically ask for "your" address: just an address. On the immigration form the Japanese and English descriptions are different: address in English, contact point in Japanese. Who's to say that you won't stop by the Prime Minister's house to check for messages?
7) I put Aleve and Claritin pills in an Advil bottle all the time. How is this lying? As I said, you won't get in trouble unless you are from a "lesser" race or nation, in which case they will nail you for bringing in Crest toothpaste (which BTW is also illegal in Japan).
8) No, I am not a racist.