I understand what your are talking about but what do we do? Put our head in the sand and let Bitcoin go away or centralize and put our Bitcoins back in a digital bank that is insured by the FDIC and end back where we are now. I doubt I will lose my Bitcoins on my secure Linux box but everyone I work with that is not technical would not be able to run their own secure Linux box. They can not even secure Windows. I gave up supporting Windows for my family and friends. I only run Linux Systems at my home and I only support Linux for family and friends that are willing to go in a different direction and not use Windows.
Maybe we need a hardware device that is not on the Internet that holds our wallet private keys and uses an API over the local LAN to request that you send money. Then you have to walk over to this secure hardware widget and put in your password there. Of course this would put Bitcoin out of the hands of everyday users who would not want to spend any additional money to send and receive Bitcoins.
-Dukejer
The cheapest android device is 99 here in italy. It can be used as a "close" system. You install a thin client, install the fat client on your PC and keep on your PC the encrypted private keys (AES encrypted). These keys are downloaded from the android and decrypted by the cell phone on demand (your phone have the AES key). The PC needs "rearming" if the AES key sent is wrong. The AES key on your phone is PIN protected. You can send from your PC to your cell phone the public keys of persons you want to pay. You want to pay someone? In some "sicure" way you send the public key of the person to your cell phone, use the key to decrypt, and send the signed transaction to your PC. You don't use the phone in any other way than a client of bitcoin. You don't put a sim in the phone. You don't browse internet. Done.