Technically you could be subjected to a MITM attack on any WiFi.
Public hotspots are just more prone to it, because nobody can control who's on it in that sense.
They could also sniff and do PCAP logs on you to grab your passwords, switch out all images and do page redirects.
Better put on the tinfoil hat!
[img]https://lh4.ggph*****m/z9c_CQmF-iOw4scL_xHume7A4oIGcKiXfy-9xoxFzKHjt7o4w7eNGTcrDwmzvMol3cQ=h310[/img]