You’ll remember a recent post in which I talked about how you might or might not defend yourself against ISPs selling your browsing history. As I mentioned, VPNs can protect you against ISP snooping, but you are still required to trust your VPN provider instead. Rather than blocking or encrypting your secret browsing habits, another approach is to bury it in a flood of nonspecific activity. This privacy by obfuscation approach was recently profiled in a good episode of Reply All. There’s a browser plugin that runs random searches in the background, and another that clicks all the ads on any page you are viewing (apparently banned from Chrome). Finally, another app can ping random URLs for you (though that one is not particularly user-friendly).