Multiverse inventories will stop people bringing 64 stacks of diamond block back from creative too.
GriefPrevention is my weapon of choice for two reasons. It's drop dead simple and for a survival map (to a lesser extent creative) the first chest you make is automatically protected and also gives you the instructions of the system.
That way it's really up to the player to protect his own work.
In creative, I'd have to check it out, but I'm sure you could give them unlimited claim points. It also protects to the height of the game, so no "over" griefing.
If you need an example feel free to connect up to my server for a few minutes and bash away at the nearest building.
I think if I were looking for a co-owner, that video would be quite impressive. You're obviously very mature for your age and I wish you luck, though it doesn't look like you'll need it.
I'm just in the middle of a server experiment that I was running while I waited for a reply. Give me ten minutes to wrap up the test before connecting to the IP I'm about to send you. See you on there.