Re: prespective anyone?
"The tracking of websites you have visited is only so they can better target adverts."
In general, that's right.
"Advertisers don’t care that you have piles"
Of course they do. That's how they better target their ads and increase ROI!
"they don’t want to go to the effort to tell the world, his wife and dog that YOU have a bunch of grapes hanging from your arse."
I beg to differ. Do you use FB much?
"All they are interested in is serving you up some adverts for Preparation H, an advert you are more likely to click on out of interest in the product."
But to get a better ROI, that want to know that you have piles.
"If DNT is implemented correctly and observed correctly, it wont stop a single advert appearing on a single web-page"
That is not its intent.
"All it will achieve is that a random advert will appear instead of something relevant. "
"Most of the adverts I see are for technology products, stuff I am interested in."
That's you. Others may want the choice.
"I know their are some less than scrupulous people about with ulterior motives other than to try and flog you some lotion for genital warts"
Read 'every ad corp are less than scrupulous'.
"but these people will most likely have other ways to get around the DNT flag anyway."
No getting around it needed. They just ignore it.
"you can always use ad-blockers"
DNT is NOT about ad blocking. That's something different altogether.