Ahh,
morm, but Isildur had a legal claim to the Ring as weregild...a claim accepted by Elrond et all. But yes Deagol definitely.
Nerwen's got me thinking more about Gandalf again. For it was Gandalf who was responsible for destroying the Balrog...certainly a rare and endangered species.
And advising the youth (Pippin) to kill themselves: "Throw yourself in next time and then you will be no further nuisance."