Nobody expekts da orkish inqwizishion-thingy!

But in all seriousness, the Waaagh-field provides the orks with an innate knowledge of what is 'orky' and what isn't. Genestealer-infected orks, if they aren't compliant, are quickly singled-out and subsequently krumped if they don't quickly run away

That's why Orks are the master race :D, they all follow Paz of da Waaaagh, established by da Orkish Lords Gork and his first pupil Mork )

Stoopid git, I iz jus' sum random barrel, I iz! Have ya eva seen an ork dat's lookin' like a barrel? Dats sum unscientific thing dat is!

Now shut yer gob and keep on da lookout, der might be kommandos anywhere 'round ere, sneakin' up on ya, tryin' ta shank yer twiggy back whilst ya ain't suspektin' a thing!!!

Alright, alright! Just wanted to be sure, that sign got me confused, I'm an eldar, after all, we are often tend to be confused....