The distribution opt-outs really bugged me at the time, and I went and talked to the marketing team. Surprisingly, users who got Chrome via one of those opt-out deals used it at rates/in ways statistically indistinguishable from "organic" users (i.e. users who manually downloaded Chrome and installed it). This was a pretty strong counterargument to the idea that we were pushing something unhelpful on people who didn't want it -- they seemed to "want it" as much as the people who'd bothered to go find it manually.

I still didn't (and don't) love the practice, but it called in to question a lot of my assumptions about what people knew about software, why they used what they did, how they found it, etc.