"probably" doesn't lead to "yes, it works". What's the tradeoff? How many good actors does "probably" imply?

Ok, say you are tracked by google, facebook, adzerk, and twitter. If you set DNT, you are now only tracked by google, facebook, and twitter. Yeah, it was pretty much pointless, but you are being tracked by one less network, so it worked to some extent.

It is trash, but at least it is something.

>"...pointless", "it's trash..."

Compelling arguments in favor.

Chemotherapy will probably cure your cancer but since it isn't 100% effective you'd decline?

well, that's not what I said either, so bad on you for the false analogy. Staying in line with my actual argument and using your analogy; what is the success rate of chemo? This is absolutely a main driver in the treatment decision making process.

5%? Nah, I'll pass; I don't want to spend my last six months in agony, so it's not worth it (i.e., bad trade-off). 95%? Hell yes, sign me up. Your own analogy supports what I said earlier.

On a side note, the statement "Chemotherapy will probably cure your cancer" is also not true and shows a bit of ignorance re cancer therapies in general.

Anyone that would check that box would have a tracking blocker installed anyway.

I don't think anyone here is saying it is a great solution. There are plenty of people without Ad blockers that have it checked though, see Internet Explorer users.