The Hive Mind would just like to let you know that it really is nothing personal, it's just that you are delicious.
Join the Swaaarm... Transcend with uuusss, and bring your fat frieeeends...
Well the "rumors" are that a similar thing was already done to the vespids.
The Vespids didn't have the Hive Mind cramming a psychic will stronger than the Inmaterium itself tho.
Or did they?!
I'm not saying the vespids are actually just what the tau are showing of a suborned splinter fleet, but...
E: plot twist, the tau actually are a splinter fleet, just one that's figured out how to get by without completely consuming all biological matter in their way -- the ones the imperium actually see are the infiltrated genestealer equivalents
High Norn Queen: "Juuust as plaaaanned...."
The Imperium are already kicking themselves for not exterminating them while they had the chance, such a twist would make Emprah himself jolt a few moudly bones into self kicking action.
Plenty of ways around that. Build drones specifically to snipe synapse creatures, bribe them with food, broadcast a false hivemind signal.
That first part is what everyone wants to do anyway and turns out to be still rather hard to do. Bribing Tyranids with food when you are food is a...poor idea, to say the least, and as I said before, Hive Mind signal is a bit hard to drown out with one of your own.
I like the idea of a spess mehreen with a bag of
dog hideous space dinosaur insect treats trying to lure a hive tyrant into a cage. Or perhaps a giant jam jar, air holes in the lid and all.