I think there should be some kind of law that terms & conditions should have a 'plain english' layout, and declare if it installs adware, collects information about you e.t.c.
I had a contract with a new mobile phone network last year, they said half price via 'cashback'.
To get the cashback I had to save all my bills & send them in after 6 months, registered post, & they must be recieved within a very small window of time. All written into a T&C page as long as the great wall of china.
Needless to say I didn't get my 'cashback' & could do nothing about it.
Theres a moral here somewhere, but I still click yes, next, next, finish..