Anti-Xray for ores, what about Monster Spawners/Dundeons?

I've seen different types of anti-xray plugins that go as far as hiding the Ore from possible xrayers, my situation is, I have a couple players on my small server that like to go hunt down dungeons and claim them.

I've never used an anti-xray plugin to be honest, but from what I can tell, they either force a texture pack, which seems like a punishment to those with HD texture packs, or the plugin hides the ore until they are uncovered, which I don't really feel like taking the chance of something goofing up.

All I'm looking for are suggestions. I have an idea of who it might be, but I have no hard proof, and the findings of the dungeons are found by who ever well before someone else does and reports it, so BigBrother doesn't have records of any edits.

 

Bump.
I don't suppose anyone knows of anything?

Also, yes, I just noticed I misspelled Dungeons. I can't seem to correct it...