> The search given at the start of the article, "porn kids", now returns that they have nothing matching. Unlike other two word searches, where if it doesn't find something matching both words, it looks for similar things, "porn kids" is a flat out statement that it has nothing, suggesting that they explicitly special cased it.

Doesn't really surprise me. I can just imagine the manager demanding that the child porn searches stop immediately and this makes the most sense for a rapid solution. The question is now though how well did they guard it. I'm not going to experiment though, those kinds of could probably land me in jail here.