とりあえずFBI用の通報ページのリンクとチクリ例文はっておくね(@wぷ

https://tips.fbi.gov/

From: A Sincere Informant
To : Officer in charge

http://sakura03.bbspink.com/test/read.cgi/ascii2d/1140318566/l50

The thread of the bulletin-board on the above-mentioned url
provides the information constituting the crime of 311.3(a)
prescribed in the Penal Code of State of California, additionally
the server storing the data of this thread is situated within
the precinct of California in US.

The thread is written in Japanese in the main, however the
illegality therein is enough to blame according to the law(@wぷ