no you request a resource (webpage) the ad was sent to you by the owner of the resource (it's his right to put whatever he want the the webpage) as your right to not request it/block it
It's like going into a hotel, restaurant, college lecture theatre, or library and immediately being mobbed by sales people.
The owner/landlord may have given permission. But it's still not a welcome intrusion, and wearing a "No salespeople here" anti-mobbing suit is a completely legitimate personal freedom.
