Just to clear it up, Fortress Blood Harvest is being made on the planet itself somewhat distanced from other settlements. I'm not saying that the youngest brother can't send agents to try and spy on what's going on, but after seven days harassment free to dig in and entrench themselves my boys are going to make such efforts a very hard, highly dangerous operation. Trespassers will be shot, survivors will either be shot, stabbed or taken alive for interrogation/conversion. While the Nur'xal do have some understanding of basic rights, their version of them is somewhat different from the traditional meaning of the term; And they certainly don't apply to the unenlightened.