"Many times I have been stuck on an "untrusted"
Internet connection and need to log in (insecurely) to a certain
site. My university, for example, uses a system that has no way of
logging in via HTTPS, nor does it secure the traffic to and from
the browser. I have moderate faith that the folks at my ISP aren't
snooping my traffic (since I know the company pretty well and used
to work with them), so I don't have a huge problem logging into
their site at home. I also have a colocated server at the web
hosting company I work for, so I know the layout of their network
even better and trust them not to snoop or interfere with my
traffic. But when I'm on the road connected to some dodgy insecure
hotel wifi, I acquire no small amount of anxiety over the fact that
anyone with a packet sniffer can get access to all of my personal
and academic details."