Is it fair to use ad blocking software?

I believe it should be fair. It obvious companies and all can't grow without ads, but there's a lot of harmful ads out there on the internet. I'm the kind of person who doesn't like taking risks, and if it's possible I'll avoid all of them. I myself try to avoid ads as much as I can, as many of them are weird, repetitive, and most of the time try to harm me or my system. Ads should go through some "check" before they get approved and can go through, that way, if there were no harmful ads; there wouldn't be a problem.