Forgive my naivety, but what problem is this solving? Maybe I'm not in the loop, but I'm not aware of a large amount of malware that forcibly downloads itself m

Forgive my naivety, but what problem is this solving? Maybe I'm not in the loop, but I'm not aware of a large amount of malware that forcibly downloads itself marked as an Adium.dmg file. It seems like this is a hoop to jump through. Come to Apple or else your users will be scared to install your application. (also, none of the comments seem to touch on the fact that this is OPTIONAL in Mountain Lion. Of course, I hope it stays that way or it is modified to be... less fear mongering)