Bottom line: nobody can be forced into seeing ads.
Beyond the ethical considerations, which I think can be clear but aren't always (depending on the type of advertising, such as pop-unders) I'm not convinced there aren't legal considerations as well, which is why elsewhere in this thread I asked for more information when a lawsuit was referenced.
Beyond pop-unders and similar advertising that I think can be clearly defined as outside the bounds of acceptability (see my other post that mentions pop-unders for details), I think this is very clear. When media is presented to you under the condition that you view their advertising, whether inline or before access, refusing to do so clearly removes your rights to the content as well. You have no implicit right to the content, only what they grant you, and under their conditions.
I have yet to see an argument otherwise that sways me in the slightest.
P.S. To be clear, I also occasionally do and have bypassed ads, circumvented authentication to content, and used copyrighted material without right. This doesn't negate my argument, it just makes me a somewhat of a hypocrite when I do so, which everyone is at some point in their life. I just refuse to bury my head in the sand and act like I'm entitled when I do, and I feel bad about it (to varying degrees, depending on circumstances) when I think about what I'm doing.
Remember, people have no inherent right to the content they are consuming it, they are getting it because Google is presenting it to them with some expectation that it will benefit Google. That benefit is usually revenue through advertising, in the cases where it's present.