Am I allowed to contest your evidence?
Firstly, I dug up that entire base looking for hidden chests. When I don't find a chest with diamonds in it, I go looking. that particular room was underneath randomly placed dirt, it was not hard to find and I didn't use Xray to find it. It was also directly underneath an enchantment table.
That one screenshot looks like the only evidence you actually have, which I feel I adequately explained.
The other tunnels, without knowing exactly which bases you're talking about, can be explained by my simple mining at y=26, where most mineshafts occur, or the fact that most bases I found, I'd revisit or explore the surrounding caves. If you can privately PM me the rough locations of the other screenshots, I can most likely explain their occurrence. However, seeing as my clan already has access to about 5 different grinders, I don't see why I would logically xray to a random dungeon.
Can I please get the corresponding base locations with the rest of your evidence?