If everyone got one of these, websites would just change a bit of code, and ads would work again. Thankfully, most people find advertising a useful part of their lives - adblock usage is still something like 1% of users.
blocking ads is as ridiculous as trying to block porn.
Ever tried getting past adblock? It's very trivial.
Also I'm not convinced this method of removing ads would work on ads served over https, where they can't inspect the traffic.