[Assassin]

If they watch other hackers and notice similarities between what they do, and what the hacker does, they make stop doing it. For example alot of hackers have a nervous twitch. When somebody shows up behind a wall they will almost gaurantee twitch towards them as if they know they are there. Just 1 of many examples.

+1 yup thats true and when we point out that how they knew there was someone behind the wall they will learn from their mistakes and next time they wont do it again this will make it harder for admins to detect them and become better hackers in the future