in an ideal world.....
Lets be fair, adverts pay for most of the "free" stuff on the internet so if you use a service that is funded by adds, then let it be..
And If all these data slurps did was target relevant adverts there really would not be a problem. A few times when I have been researching a new purchase I get relevant adverts appearing on websites and on occasion it has given me a link to a product a the best price I had settles on, or given me A better option. Great. Job well done...
But we know that's not the case...
there are companies that a gathering all the info about is they can, no doubt they have a file on everyone including everything you have ever searched for, every phone number and email address you have had. I would guess that most of this information they have no clue what to do with it, they just know its valuable to someone...