Maybe Belgium can offer Snowden asylum now.

More seriously, who uses public internet terminals for anything? I would never log in from one.

I would (and admittedly not very carefully) use a public internet connection with my own laptop. If I was carrying state secrets, I'd hope that my state would have given me a very well-configured laptop which would just use the public internet for a VPN, and would allow no DNS or anything else to be consumed from the public resource.