It's like a meteor strike: well reported, flashy, but very very not likely to actually happen to your site. How many websites do HNers collectively operate? How many have ever gone down because the FBI took their hardware? How many have ever gone down because, oh, the hard drive crashed? Because they pushed bad code live? Because they misconfigured a firewall? Because the hosting company had a network or power issue? Those are real risks for your business. (Bonus points: many interventions for these and similar issues fixes your FBI problem, too!)
In the event of a totally freak incident like this, you're probably going to have downtime and a day's worth of data loss, but recovery for most folks here is likely "Reimage the VPS(s) from the latest backup, hit the on switch, and change DNS records."
Yes, if you look at the risk of a US government raid on servers, domains, or what-have-you in the past 5-10 years, you can fairly compare it to a meteor strike or a "freak incident".
But things are changing, incidents and "collateral" are increasing, and if you look at just the past half year, you'll find it's gone from a meteor-strike level probability to a very small but definitely not dismissable chance.