there is an ad blocker arms race going on, with people coming out with anti ad blockers which are basically out of date the same day
are adblockers considered stealing?

It's my device, I paid for it. I also paid for a network service to deliver data to me and the electricity to run the device. I then use my device to request specific data from the internet. The entire model of web browsing is based on a client requesting something and a server sending it.
I ask for a webpage and receive it. The page has links to images, so I ask for them and receive them. There are also adverts which can take up great deals of bandwidth if they are autoplay videos. If I choose not to ask for the adverts, that's my choice.
Where the publisher has a choice is that they can either serve me content or not. If the publisher doesn't want to send me data, there's nothing I can do to force them. That's their call. They can tell in advance if I'm using an adblocker and make a decision. They can also choose to offer services that are so good, I either put up with the ads or pay a fee to use them.
Imagine going to a petrol station and being given an extra 5 litres of unleaded which you didn't want. But for some unspoken reason, you still have to pay for it. Now imagine you have finite wifi and an ad in the form of a video starts to play, again without you wanting so. It takes up your bandwidth and you essentially pay extra that month if you use the same amount of internet. Why are the situations any different?

Jesus Christ, I didn't realise how long that was, but mostly credit to the comments in the below link: https://pagefair.com/blog/2015/ad-blocking-report/

Let me guess... you don't think you should have to pay taxes, but you're the first to complain about a pot-hole in the street.
P.S. " I_shalt" is grammatically incorrect.

Learn to dab on ads that don't come up because you are using an ad blocker which is undeniably awesome

soupram says it well however if you use and enjoy a site everyday or on a regular basis and you don't want the adds it makes sense to pay. Otherwise how will they pay their bills?

I pay for premium, but I always use Ad-Blocker also. The reason isn't annoyance - it's security. It's VERY common for ad companies to ignore security issues in their ads and it becomes an attack vector for malware. Even companies like CNN have been hit by it. Ad-Blocker is akin to anti-virus in my educated opinion.
I have been using adblockers for quite a while, and very effective in blocking ads and filtering out other content as well. Is this considered stealing? If chess.com brought me to court over ad block use, I doubt it if it would hold up in court. The whole freemium idea is a pretty dumb one. When I registered for a free membership, I was under the impression that it was free. Where does it say I have no choice but to view ads? What is wrong with having control over what content is sent to my monitor?