8chan is another beast and I'd imagine that site to be as toxic as what goes on. I would imagine no good relations nor prior willingless to play ball. They state they "comply with US law" and are "responding" to the police. Doesn't seem as friendly as 4chan's approach.
Of course in the US it's common to "never talk with the police" so I should affix by saying that I'm a European and have more trust in the law
I'm more inclined to believe that this FBI agent is not familiar with standard operating practices, seeing as his biography describes him as spending most of his career working on drug gangs, which is a somewhat different beast than online domestic terrorism work.
Relationships aren't really with the organization (RE the 4chan comment), they're more with the individual agents and pretty decentralized. I've never had the same FBI agent twice, for example.
I don't know why they decided to escalate to a search warrant.
This is not true. HTH HAND