I'm surprised reviews were enabled for those locations.

From their explanation of posting restrictions [1] that was linked in another comment:

> Posting on a particular place may be turned off if its category or geographic area has experienced a continuous pattern of low value or off-topic posts. Contributions are considered low value when they don’t typically play a large part in helping users decide whether to visit the place.

People being detained generally aren't asked by ICE which detention center they want to be put in, and people visiting a detention center generally are doing so to see a client or relative, so ICE detention centers fit this (as do most other incarceration facilities).

Later they list characteristics of places they may restrict, and one is:

> Generally unvisitable or have limited public access. These are places where people typically don’t have a choice about which location to go to, that aren’t open to the public, or where access to the place may be limited to people who are stationed or assigned there.

Most incarceration centers definitely fit this.

[1] https://support.google.com/contributionpolicy/answer/1303613...