There is. Just not one as catchy. Copyright infringement, subreption, fraud and others, depending on what exactly you are doing.
Everything the content industry whines about is already handled by the law. They just create the impression that it isn't so they can lobby for more laws to "close loopholes" that don't really exist. They call it "theft" so you have a mental image.
Words are important. Aldous Huxley believed that if you could control language, you could control the people (and he feared they would try). But more important than words are the ideas that they convey. None of the words you listed above describe the topic.
You keep assuming that theft only applies to tangible objects. That is why you're satisfied that it's not wrong to use a ad blocker. One of the sub definitions of theft is to deny a person the use or benefit of their property.
be property of some sort;
be property capable of being
taken (therefore intangibles are excluded); or
converted (and may be an intangible);
taken or converted in a way that deprives the owner of his/her proprietary interest in some way.
The owner of the material's copyright has the right to garner income from that content. When you block ads, you deny the owner of the web site the ability to convert their property into income. You don't know if it is a hobby or the owner's livelihood and that should't matter. Your like or dislike of ads is equally irreverent. It is the right of the owner of the content to place ads or not place ads.
It is a simple moral issue. If you use shareware (or commercial software), you should pay for it or not use it. If you don't like the ads on a web site, you shouldn't visit it.
Regardless of what some people would like to believe, it is commerce that built the World Wide Web as we know it. And it is the continued interest of commercial entities that will keep the web alive.