I decide what I want downloaded, because I pay for it and I fucking hate ads and that is why I use ad blocking software. If I want to buy something, then and only then will I look at some ads (maybe). If you want to run a business web site or your own web site then you pay for it. If you don't like me looking at your web site, fine I will go somewhere else, just don't expect me to look at ads.
The recent slashdot poll about ads said it all, 65% use ad blocking software and do not feel guilty about doing so.