You may have seen in the news that Google is researching methods to censor the web.
Google's censorship is nothing new: they've been censoring this site for nearly 7 years.
And lying about it. You can read
more about Google's censorship here.
in computing, a bug that disappears or changes its behavior when an attempt is found to locate its source or to generally investigate it.
This is an actual occurrence, since tools such as debuggers do change a program's behavior. Even "innocuous" techniques such emitting debugging output to a console changes the runtime of programs and can affect timing-related issues.
Definitions include: person who engages in computer security breaching through use of widely available prepackaged exploiting utilities, for recreational purposes and without significant low-level knowledge of computer security.