Those work the opposite way: a blacklist is downloaded nightly.
Unfortunately anyone on the web can publish EXEs. Look at how big anti-virus definitions are, for example.
Do you really want some central organization dictating who can make software and who cannot? Who could you trust with that?
I don't think they are preventing apps from being run, just showing a warning message.
seems likely. One reason I can think of: have you seen the amounts of crap the average I-think-I-know-how-pcs-work human installs, causing the OS to become totally unusable? And then they start blaming it on the OS?
If one company does something wrong it does not excuse other companies from doing the same thing wrong.
True, but it seems like nobody cares about Apple having that information.
OS X sends info on apps installed outside of the app store back to Apple?