Well the site is hosted in the US.
Under the polices there is this section:
so it's american, whether or not the owner is from the UK.Freedom of Speech
Although the constitution of the US guarantees that Congress shall make no law abridging the freedom of speech, this website is not Congress. Freedom of speech rights do not extend to this privately owned website. The TOS/Guidelines of this website governs the behaviors and activities of the members. If you choose not to follow the guidelines agreed to during registration, the result is a disabling of your account.