Remember when Dutch LE hacked a bunch of cp hidden services? That's not something the more professional LE like FBI or SOCA in UK would do. I don't think their agents would be trawling around these forums, based on the magnitude of other crimes the deal with, but there are 200 countries in the world and there's no accounting for what some random LEO decides to do. So there might be LE, but not necessarily from the most represented countries. Look out for special deals or weird references to specific countries.