Doing so is a crime, and anyone who intentionally engages in or materially supports those acts should be tried, convicted and imprisoned.

WSJ: We Don't Need Guantanamo Bay

Being in Ihram means not whinging about people, not intentionally harming anyone and if you're married, no sexual relations with your spouse.

BBC: Aerial view of Great Mosque at Mecca - file 2006

The debate goes back to Socrates, who argued that anyone who was acquainted with good could not intentionally choose evil instead.

CNN: The necessary evil?