Some accountability for their software, but this isn't the time or place for it. How many of these were cases of the user of the OS doing something stupid? At some point the user of the device needs to be held accountable for not properly patching/updating the device. If the software is something truly important, Space Shuttle O2 system, nuclear power plant, etc... Yes, they should be accountable for defects, but not because Facebook User #2,290,231 clicks on a malicious advertisement and gets malware installed because he didn't patch.