@Thomas,
I sometimes ignore on a temporary basis, with the expectation that the present behavior will change but that I don't want to watch it in the meantime, or that my irritation level will change - and I've taken people off of ignore after a timeout for them or me. I've two on a long vacation, perhaps very long.
On scrolling as an alternative, I've done that for years, and I read a2k a lot. Some of the benefits of only scrolling are that one can enjoy the counter arguments to the irritating person, which have their own learning benefits, or scroll past those too. I also get that we can all be irritating people in our own special ways.
So, I think of it as a useful tool, that at best can let me enjoy the rest of a thread.