They appear to be saying that ad-blockers "interfere with [...] in an unauthorized manner the devices, servers, networks, or other properties or services of any third party"
Which is baffling, because I as the operator of my web browser is the person who gives authorisation for code (including ad code) to run on my browser on my machine.
I can think of a bunch of stuff that interferes with stuff - readability is an example. Why is it not okay to block ads, but is okay to drop CSS and reformat a page?
I fully understand why people run ad-blockers. I don't use ad blockers, so I know just how awful many ads are.