Whilst it's preaching to the choir, I would attribute 50% of the blame to Microsoft. Loading any old thing and running it is not very responsible.
50% is a bit much. People do expect their hardware to just work. That means installing drivers and the like. And the act here is so egregious that I can't imagine being an LG engineer and living with the shame of being so incredibly despicable.
I'm disappointed with Microsoft, I'm incensed at LG.
It’s as if nothing was learned from AutoRun CDs and the like.
Microsoft doesn't police IHVs -> Geeks: "MS is negligent!"
Microsoft does police IHVs -> Geeks: "MS is an evil monopolist!"
I'd argue closer 75%. Vendor abuse of this is hardly restricted to monitors, even if this is one of the more egregious cases.