Absolutely, use something different and more complex to 4 common words. That's pretty much what I am saying. My argument is that whilst you are switched on to t

Absolutely, use something different and more complex to 4 common words. That's pretty much what I am saying. My argument is that whilst you are switched on to the problem enough to do that, a lot of people simply are not. So stuff like the XKCD comic can be harmful. To the second part of your post: sure it's a concern. But that wasn't really the subject of the post. You will never protect yourself completely, but I've always argued that if you're concerned about the sort of things you're concerned about it's already too late. We should train people to use the internet safely and be alert for compromise at the individual level.