Because it's not always reliable and can cause things not working properly. It's really easy to create ad block killers/popup modals etc. It's just that lately

Because it's not always reliable and can cause things not working properly. It's really easy to create ad block killers/popup modals etc. It's just that lately site owners have began fighting back. It's really interesting where it leads us, site owners and more importantly ad networks have been lazy trying to defeat adblock. Let the war behin I guess.