I can't speak for installs from other sources, because I hear what you say is true. But I saw with my own eyes that it didn't happen with IM.
I know, it's in your profile, and easy to find, as I did. But I'm a newbie here, I don't know personalities, and your posts made it sound like you're some Joe-User happy with IM's product, which isn't really the case.
There are contrarians in every thread, but if there is one thing for certain besides death and taxes, it's the fact that nobody wants this garbage on their machines. It's the cancer of Windows. To see someone so adamantly defending it had me really confused.