When this happens and lulzsec or others are still continually proving that nothing has worked because the original security problems still existed, will Joe Sixpack be blind to this?
You (e.g. the government and its cronies) start screaming - we need more control for your security! They are coming for your beer! These hackers are trying to take away your refrigerator!
And Joe Sixpack will gladly turn over any liberties he has.
Just like with TSA. Joe Sixpack obviously couldn't care less. He doesn't care that it is costing him insane amounts of money, he doesn't care that security doesn't really work. He doesn't care about body scanners. Hell I bet that if TSA went and mandated that a random passengers need provide anal relief to TSA agents - JSP would not really care. Because he is a true patriot(tm).
All you need to do is to perform a Jedi mind trick: "You feel safer now."
Measures not working? It's obvious: We need more measures. LulzSec stop their antics due to some unrelated coincidence? The measures work, let's make sure nobody hacks again by instituting more measures!
How many terrorist attacks on airplanes have there been since 9/11? Are measures getting stricter or looser?