Hello,
I am also against politicals subjects / ads,... here.
Then about the "ads", very irritating, I also agree.
But you can not change it. It is depending the coockies on your personal computer, operating system and the internet exp^lorer you use (IE, Mozilla,.....)
Not forget that all the "ads", are added by Google itself, depending what you visited before.
Test it, look what ads you have. Then go to a other wel know site, and soon the ads will change to this site
With all the knownledge of Willy, only Google can chage something ! And they will not do of course.
It is one of financial institution, not philantropic ! As far as I know !!!
So to reduce as mch as possile is to never clic on the "ads", and for sure never on "close" ads" !
Of course the action is reported to Google, and the next time, a other "ads" , will appear.
Because, tou close it, Google, will suggest a second advertising....
For people who "clean coockies" after closing brwser, good idea, but it change nothing !!!
On make the next visit a little bit slower.
Why because all coockies are also registred in a other file. Not the content of coockies itself, but the name.
Under Windows, it is in the old "document and setting" folder. Who is not more accessible since Win7.
Only by start under Linux, from a boot CD (or US

you can access it !
Normal, before start of WIN, the security groups are not activated
So, unfortunately, I see not solution about "ads".
And I also not agree about political.
BOINC is for research