Ads themselves are just annoying but tolerable. But we’re talking about targeted marketing. Ad companies keep data on you, the user, so they can squeeze out a bit more money from avertisers. That requires the users’ consent in many parts of the world and ad companies still try to weasel around that. When you don’t want them to have your data, a word from you should be enough. No hidden options, no clicking through a dozen pages, no ifs and whens.