Deuterostome,
Actually paranoia is an unjustified or irrational fear.
There are hackers in the world, and they often do create viruses and worms and other malicious software. Generally anti-virus software is updated to deal with the threat, so hackers create newer bugs. This is not news.
Our government has engaged in massive illegal warrantless wiretapping. There is ample evidence of it.
Various governments, which include the US do employ hackers for various purposes. The Russians, as an interesting note prior to invading Georgia launched a massive cyber attack. This is known.
If a person was wearing a device that actually could display information to them via special contact lenses in the same detail as the human eyes, and that data could be manipulated via hackers (whether or not they affiliated with a government), a person could be quite cleverly deceived and manipulated. This would potentially be a far more serious of a problem than what a modern day, run-of-the-mill hacker can do today. I mean a hacker cannot make your eyes themselves see whatever he/she wants you to see...
I should note, however, that governments do tend to have better resources at their disposal than your typical run-of-the-mill hackers do, and would be far more effective at defeating anti-virus and firewall software. Russia has already employed massive cyber-attacks for tactical/strategic purposes...
So, with that said, I would not consider my statements to be unjustified or irrational.
CuttingEdge100