I only know because I've heard conversations on discord about it, but I have no definitive proof. If anyone knows a way I can block them (like having the server recommend the default texture pack) or catch people using them, that'd be nice. Thanks!
The Meaning of Life, the Universe, and Everything.
using an anti xray.. that plugin will detect the time between you find an ore vein too fast, if someone find it that fast its using xray after that just make you invisible, put a troll chest where no one can find without hacking and see the player finding it, there you have the proof you need.