These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
What an Idiot: Doctor Karen Howell deciding to call out Warren for his villainy while alone with him at the same time franticly trying to seal away the necromorphs in the tunnels, providing both the means and the motive to silence her.
Weller makes a similar mistake. Having come to his own conclusions about Warren's misdeeds, he then turns his back to him and is promptly shot.