You're thinking too big. "Normal size datacenters" is a small industrial building with 20 racks. And yes, they walk in, shut the power and start hauling drives. No joke.
Or, if they suspect disk encryption, they don't shut the power. Instead, they dissect the power cords to add a special UPS, so that they can move servers without powering them off...
crazy I know right?! it might just work though.
your shit isn't getting raided unless you are facilitating some horrible stuff
[0]: https://en.wikipedia.org/wiki/Harvey%27s_Resort_Hotel_bombin...