I'd say fuckwaddery or whatever is more proportional to the distance between the user and the person they're communicating with. If someone lives in the same town, you'll be a lot more hesitant to insult the hell out of them than if they live on another continent.

That might be why Facebook, Twitter, Reddit, etc are so screwed up. Because the userbase knows that there's a very slim chance they'll ever meet the person they're attacking online. That there's a slim chance there'll ever be any genuine consequences for their actions.

Of course, making it easier and more convenient like on the sites (or limiting people to only 140 characters) definitely makes it easier to be a douche. But you're not going to send a threatening SMS message to someone sitting next to you.