LilMiss - the point I was trying to make with my last post is that, regardless of where the faffing is happening, you might well not be able to tell, just by looking, what is making someone faff. Obviously I didn't make that point very well.
I should say that I do agree to some extent, that faffing can be very annoying - and if you know it is down to someone else's sheer thoughtlessness, then you have every right to be irked with them. I do make sure I am ready at ticket gates, or airport security or whatever - but I am not perfect.
And whilst I agree that drivers should drive at a suitable speed for the road layout, and traffic and weather conditions, I think I remember being told by my driving instructor that you can't use someone else's poor driving as an excuse to drive badly yourself - so the person who overtakes a driver they think is too slow, somewhere where it isn't safe to do so, is responsible for their own poor driving and any accident they cause. Morally, the slow driver would be in the wrong, but legally - I suspect it would be the driver who let the slow driver irritate them to the point of driving recklessly themselves.
And I think that the advice to try to chill out a bit, and take a less stressed attitude to faffers is good. Like it or not, we can't control what other people are doing - we can only control our own reactions to them - and if you let a faffer send your blood pressure rocketing or make you get annoyed, it doesn't affect the faffer at all - the only person to suffer is you - and why would you choose to suffer, when you could choose not to?
There are lots of things in the world that stress me or upset me or annoy me - but I have to take responsibility for how I respond to these things - I can't control the world, but I can control my own reactions. It doesn't make things any less annoying, but it makes my life a bit calmer and nicer.