Unless you can point to something that I have done or said that has changed the course of the public opinion in a negative way, you've got to check yourself sometimes and say, "Maybe I don't like the way that this thing is said, but it's expanding tolerance. " If I said something that was shutting down something that was positive, call me out, but I don't really see me doing that.
If you go to a coffee shop or at the airport, and you're using open wireless, I would use a VPN service that you could subscribe for 10 bucks a month. Everything is encrypted in an encryption tunnel, so a hacker cannot tamper with your connection.