Joking apart its a very effcteive observation mothod....

e.g. moderate left bend approaoching.....school on the right....are there kids around......start dropping  speed to 30 for the 30 zone etc etc

How many of us drive home half thinking "well that was s**t day at  work today, such and such really ****** me off"

ie it keep your mind focussed.

thats my opinion anyway!  

Again joking aside, its inevitable that occassionally some distraction will take place.

You just ahve to be aware of it....and drive accordingly.

That I think is a part of the ATM concept, one which do agree with.