Interesting to proclaim intellectual property on the internet on a public server, hosting a public discussion board. Intellectual property theft on the internet is really only illegal when someone else posts said property to the internet. Im pretty sure, definitely not a lawyer, that that goes away when you dont take measures to make it intellectual property.
Kind of reminds me of a situation when a user PM'd selfies to an Admin of a forum and the Admin posted them to a thread. All intents and purposes of private property are kind of done away with at that point.
If Saint locked down the edit feature, there really isnt much the poster could do, so much as I understand it, if they provide the content willingly.
Either way, dude was a pretty solid contributor to the site and it sucks that a wealth of knowledge, advice, and constructive criticism decided to remove it all from a public forum of his peers and friends.