Dark Mechanicus? Also Tau can hack with their AI superpower.... tz tz tz, somebody needs some refreshment in lore!
Nah, Chaos has corrupted this system somewhat, the Tau wouldn't risk connecting and having their A.I. turn rampant.
Sure they would, they freaking risk even working with Humans together and tried to befriend Necrons, lol!
Maybe, but they often learn after a while and I'm pretty sure the Tau have lost A.I. as well as Kroot/Allies to Chaos before, only on a small scale.
I find this Thread Offensive towards my kind. They did... Everyone should have their own tau army bound to their will with a few million mindschakle scarabs