I'm not against "context sensitive" advertising. It can even be beneficial at times. If I specifically express a need or interest in a particular product ---

I'm not against "context sensitive" advertising. It can even be beneficial at times. If I specifically express a need or interest in a particular product --- for example by doing a search, some ads are not unreasonable. What is blatantly unreasonable and just plain dumb are these ads following me all over the internet on totally unrelated web sites for weeks or months --- long after I have made a purchase and no longer have any need. In a great many cases, "personalized" ads are totally ineffective and waste the advertiser's money while being nothing but a nuisance to the consumer --- squandering his time, attention and communication bandwidth and violating his privacy. Allow those who disagree to "opt in". This should be fair enough but the ad industry knows full well that there would be very few takers.