I'm not in agreement with the top comment's cookie needs, but no. Surveys are not comparable to using analytics/tracking to determine user behavior.
Surveys measure what people say and are sporadically filled out. Cookies measure what people do with granularity and accuracy and will have near 100% coverage.
People aren't concerned about spying via survey because they're not even in the same realm of effectiveness.
Yes it does. Have you never heard of a survey?
>doesn’t work
It absolutely can. For instance, polling via newsletter is rather effective.
>analytics is not spying.
If it contains any personally identifiable information that is not required by law, then yes. Yes it fucking is.