I think that event served as something of a wake-up call for many and made them realize that, despite any gun control measure, we simply cannot legislate our way to safety and security.
I didn't really see people acting that way. Gun sales went up a tick, but not nearly what they did in the leadup to Y2K (NWO! ZOG!).
It was somewhat enheartening to see Al Gore's support for gun control come back to bite him in Florida in 2000, and I wonder if that wasn't a waypoint as well.