Perhaps not. Unless you go for the appliance route. However I think we can get a lot better. I like how Android handles app installations. You get a simple prompt before installation that it requires access to the internet, reading of sms, sending mms etc. If we could get a similar framework in modern desktop operating systems, it would be a lot easier to identify that the app is doing what is advertised. For instance if you download a texteditor and it states in its manifest (correct term?) that it needs access to System files and incoming internet connections I would be a lot more jiffy about installing it. The idea is that the manifest actually requests permissions in a mandatory access control system like grsecurity or SELinux. Ofcourse this will not eliminate all stupid behaviour from the user, but I think the idea is good anyway.