Richard Dawkins and Chris Hitchens think they can get the Pope arrested during his next trip to Britain. This might sound like a long shot, except for this:
Dawkins and Hitchens believe the Pope would be unable to claim diplomatic immunity from arrest because, although his tour is categorised as a state visit, he is not the head of a state recognised by the United Nations.
Also, a recent effort to raise an arrest warrant for Tzipi Livni, based on the Gaza occupation, was successful, and Livini canceled a trip to Britain.
If someone started a fund to do this in the US, I’d contribute.