Public Wifi is NOT safe. (Score 1)

You incorrectly assume Wifi is used for browsing the internet. Networks, wifi or wired, connect all devices to a network, of which there are numerous protocols at work and thus, users on the network can scan / sniff for other device vulnerabilities and also go as far as to do a ARP Switch poison, (this involves confusing the switch which where the MAC addresses point to). Public Wifi's are NOT safe, especially if I was connected with Kali Linux ;)