After every tragedy, legislation gets rushed through that's typically just a bunch of stuff that various folks had long wanted all along, but couldn't pass before. Then it's hustled through as a "solution" to the tragedy, even though close inspection usually reveals that the changes wouldn't have prevented the tragedy, and don't even have much to do with it.
The goal, thus, is to prevent close inspection through a combination of heavy-handed legislative techniques and bullying rhetoric: If you don't want to pass our bill without reading it, you must hate the children.
Over the years, we've gotten a lot of lousy legislation this way -- the Patriot Act, for example, about which I wrote a column something like this one back in 2001. We've gotten it because politicians like to manipulate voters and avoid scrutiny.
But why let them?