I'm not sure it would be so much you having fingers in my pie so much as old hostilities and mutual rivalry.
<Snipped quote by Raptorman>
I dont see a problem with you being beneath the Western Erg and adding a mountain there. I would suggest, perhaps, that the Godfangs might be a better location for a subterranean faction, since the Western Erg is basically nothing but dune sea- but if that's where you want to be that's no problem. I'll add the mountain to the next draft of the map.
<Snipped quote by Raptorman>
Nah, I was thinking halitosis. Nothing worse than a psycho killer ripping you limb from limb with stank breath.