Trivia: There's a part in the book, 'The Fellowship of the Ring', just after Frodo has been grabbed by the Watcher in the water outside the gates of Moria. Gandalf thinks, but does not say, that 'whatever it was that dwelt in the lake, it had seized on Frodo first among all the Company' ie. the implication being that the ring draws attack and evil from all around. This happens in the film too - the first Ringwraith is able to separate Frodo from the other three hobbits, when they're running for the Bucklebury Ferry, the Watcher grabs him, as in the book, and even the Cave Troll singles him out.
STP
19th May 2003