The outrage isn't about about public hotspots. It also logs your home SSID, even if the network is encrypted. That's what people are mad about - having their home routers on a Google map.
So, perhaps we should advocate router manufacturers to change the default SSID broadcast?
A better comparison is your house address and number: it's out there for everyone to see and it gives them much, much more information than the SSID ever could.
If someone is being stalked they'll disconnect their phone, but who thinks to change their router SSID?
No one, given that half of neighborhood networks are probably called 'Linksys', 'TP_Link', or something like that.
As a matter of interest, what were you basing that on?