Around ~2012 we were chilling on the terrace of a fancy office in the brisk morning (after a quick server migration in the datacenter on the ground floor, which of course turned into an all-nighter) as people were coming in to work, and then suddenly the folks coming in all looked the same, greenish uniform, some had SMGs, oh well.
We worked for a small company, so we knew that they're here for the big company that does credit card transactions, but it was both surprising and ... absolutely uneventful, they didn't even talk to us. (As we were leaving we didn't even run into them - at least I don't recall any interaction.)
Later the sysadmins of the big company had amazing stories about how the tax authorities wanted copies of every hard drive. And when they told them that, sure, sure, but things are on a RAID and without the config and the card it'll be useless. They didn't care of course :)