That last sentence doesn't quite make sense. By "not even he knows he's spoiling", do you mean:
1) The poster is not aware of the spoiling rules that apply in our forum and is knowingly cross-referencing information without knowledge of our rules, or
2) The poster has difficulty recognising what information is sourced from what material (anime or manga etc)?
#2 means he probably has some issue intrinsic to their mental capacity....