Most X-rayers use the texture pack, which is impossible to make a plugin that prevents it.
Incorrect: The way oreobfuscator works is it's how it sends packets
Also Archie: It was removed because I thought it was causing lag and removed it; don't know why I haven't installed it
Also; it works by altering the way the server sends packets to everyone and there are multiple forms so I can set it to a different type so it only shows ores if they have any light level on them and THEN it would show them.