Is it a security risk to myself that I am not logging out of Twitter, Facebook, StackExchange, and a majority of the sites which I am using? Is there a chance for someone to hijack my session or cause damage to any of my online accounts?
For my situation, I am limiting all of the damage I can by running a VPN and trying to access all websites using
https://. I know a lot of users do not do this, so there might be even more risk for them to stay logged in, but also for me, there still may be risk.