You're right that 911 calls from a mobile are protected, but that misses the real privacy issue. The phone itself is the problem—it's a tracking device that knows where you are, who you called, and when. A survivor who can't risk being located by their own device can't just "make a private 911 call." Pay phones offer something no mobile can: you walk up, you call, you leave. No device history, no location pings, no link to your identity. And yes, vandalism happens—but we maintain fire alarms because lives depend on them. Same logic applies here.