Orks are savage, barbaric killers. A huge portion of them are sadistic and want to watch weaker creatures suffer, but even the ones who just focus on the great Waaagh will kill, for killings sake. It's the Orky way.
I'm not sure tyrannids can be squigified. Hence why they're such a pain to fight. They got no loot other then their heads.
Crazy thing GW floated, it existed as an actual thing, I never knew either. http://forum.eternalcrusade.com/threads/warhammer-lore-debate-thread.51835/page-7#post-1019299 for those interested, or just look at the non-lexicanum wiki, which is where I looted my info from.
Orks take humans as slaves if captured alive. Orks thread human slaves as weak orks and cos humans do not have endurance or body regeneration of an ork, they often fade away thanks to wounds from countless beatings. Only humans which have some chance to survive are Ogryns. Children are probably seen as total weaklings, squig food perhaps. And of course orks needs to eat too
To be fair, just because it's on the wiki doesn't mean GW actually ever said it. They've been known to take creative leeways with how they chronicle the lore, gonna need a source-ier source before we can believe that one. It's possible it was part of some old edition lore.
I'm over 18 so I've never gone for the whole Orks are just supposed to be funny cannon fodder, for me Orks are ruthless killing machines by design showing no mercy to any race that gets in there way just look how they choose their leaders.
