>>51833
There's a story from somewhere around 2008 detailing how an FBI swat team would stand next to 4chan's servers in the datacenter they were in, waiting for cp to appear on /b/, demanding it be taken down and if 4chan wouldn't comply they'd take the servers.
Supposedly, eventually moot let the FBI moderate /b/, and developed a law enforcement archiver for 4chan that would collect dead threads from /b/ for inspection.
Janitor appliances were open again just recently, you might've noticed that there were some boards you couldn't apply for. This time the list was expanded from being just /b/ though. Which seems weird to me, given how /b/ is supposed to be the zomg none board where even the moderators don't need to follow rules.
In 2008, moot intended to go back to the more chaotic days of /b/'s moderation, but the board hasn't seen a public ban in years.
The cp darknet sites the FBI run are always compromised ones. Someone hosts a site, it gets pulled down or hacked, is run for a short while by the FBI, and then all identifiable users are arrested. This doesn't happen only in darknets though, it's very likely m*sterchan is such a honeypot.
And on how fast intelligence agencies get involved. A friend of mine set up a board, and on this board was a hidden board, /pepe/, used to secretly gather rare pepes. To keep the board more out of light, a wordfilter was implemented, filtering all mentions to 'pepe' to 'jihad'. Now trying to link to the hidden board would result in a link to a nonexistent board.
From that day onwards NSA and FBI hostnames were among the top visitors of the site. Eventually he pulled the board offline, partly out of stress.