Blocking ads is such a dick move. This should be made illegal. You are not entitled to change a website to your contempt and cut their main revenue source. If you want to use a website/app and it was made available with the Ad, then just suck it in or use a different one.
To my eyes this is not very different than piracy. Where you use a software without paying for it's price.
Advertising is the price you pay to use a service. Targeting is a technology to make that Ad as much relevant to you as possible. And yet there's a lot of negativity in here towards both. It's supposed to be a win-win-win solution for advertisers, publishers and users and yet are met with negativity and FUD.
If you are here in HN you should think the same, because advertisement is what funds the industry you are in.
</rant>