I think you'd be surprised how a little bit of difficulty can be enough to break binge cycles. I killed both my hackernews and reddit addictions years ago by just adding them to /etc/hosts. It was easy to change and sometimes I did but that was enough that I didn't dwell on those sites anymore.
Recently I've written a chrome extension that does this much better. Hopefully it gets approved today or tomorrow. Maybe I'll post it to show HN.