Seriously, I've written in the past how Yahoo's Messenger update tried to slip past changing your homepage to Yahoo!
Today my system tray started blinking about a Java upgrade.
What does Java by default want to install? The Google Toolbar
What does a toolbar have to do with a Java upgrade? I'm not sure. They do make it easy to know what you're installing and I just unchecked the box.
My guess is that most people won't, Google has a great trusted brand.