At one point, there wasn't even a checkbox in the installer as I recall - there was some kind of checkbox on the page to download the installer, and if you didn't notice and uncheck it you got a download that installed whatever crap they were pushing silently and automatically along with Flash.
Not to mention a larger, longer download. Then you realize it and have to re-download it all over for the flash-only one. (It's happened to me a few times.)
