[jobu]

If you read the text on some of those dialogs it states pretty clearly what they're going to do to your computer when you click accept: ...collect your IP address, URLs of the pages you visit and other personal information including the content of encrypted web pages...

The problem is most users can't understand or don't even bother to read it (http://arstechnica.com/security/2008/09/study-confirms-users...)

Watching non-technical folks try to install software is like watching baby seals get clubbed. Even the supposedly trustworthy software vendors (Adobe Acrobat, Oracle Java) all install shitty toolbars and adware.

[vitd]

No doubt! Say what you want about how much the Apple App Store for OS X sucks, but it has never downloaded anything I didn't want, and I've never been hit with malware using it. Nor has my father-in-law who often gets malware from web pages he visits.