What everyone(except sven) is saying is that they are very smart and know the game super well..they inform you of inconsequential shite that barely matters.
You ARE being hunted.
This is not a flippant statement, many players hunt lower level players for a multitude of reasons, recruitment, gear, presence and of course sport being the main ones.
I myself am one such player.
In answer to the how part, i will obviously not be giving away my trades secrets, but i can at least let you know that it is not a cheat, or plug-in that you are not aware of, or anything untoward. It involves knowledge of player movements, timing, and a huge amount of luck.
But i say again..you are being hunted..