If they are making money based on views and you're using an ad blocker, then you're essentially taking away their revenue while giving yourself added convenienc

If they are making money based on views and you're using an ad blocker, then you're essentially taking away their revenue while giving yourself added convenience and/or less annoyance in the process. You're not directly taking the money (i.e. putting it in your own pocket), but you're transferring the value from one form to another, and it's going from them to you. If it's not the definition of stealing, it's pretty close.