Don't be too smug... it CAN happen here.
I moved from the UK to escape the bans resulting from the post-Dunblane witch-hunt in 1996. In less than 100 years Britain has gone from having a Prime Minister who extolled the virtues of having "a rifle in every cottage in England" to an almost total ban on private firearm ownership.
How did it happen ? In small steps.
The first gun restrictions were as a result of the Russian revolution; the ruling classes were terrified that the unwashed masses might attempt the same thing in Britain, so they started to restrict gun ownership (guess they did learn something from the American colonies after all).
Restrictions in Britain tightened steadily over the next 50 years, but the really big change came with the 1969 Firearms Act that introduced licensing for all firearms. A police-issued license was required to posess and acquire a gun, and the applicant had to demonstrate a "good reason" for gun ownership. All guns were registered with the police.
At first, gun owners (traditionally the most law-abiding segment of the populace) happily bought into this, as the majority of recreational uses were approved (hunting, target shooting etc.). It should be noted, however, that "self defense" was specifically excluded from the list of "good reasons", and this is where we Brits dropped the ball.
Over the next 3 decades there was a relentless turning of the screw on gun ownership. The "reasonable" licensing procedures became progressively more bureaocratic; license fees went up, processing times grew longer, abitary limits were placed on number and type of gun, often at the whim of local police officials. As a result, the number of recreational shooters dwindled steadily.
Of course, as gun owners represented a smaller and smaller proportion of the population, our political muscle declined to virtually zero, and the popular perception that "guns are bad" (i.e. fear of the unknown) grew amongst the people.
Then, when a shocking school shooting (Dunblane) angered the masses just before a general election year, shooters were a small enough group to be snuffed out mercilessly. After all, what "good reason" for gun ownership was more important that safety for the children ? And, the Government knew where to find us and what we had !!
Don't kid yourselves it can't happen here. I'm sick of hearing Americans brag that "the Brits were so dumb - the Government won't take my guns"... what are you going to do when the local SWAT team come to your house to get them ? Have a shoot out while your wife and kids hide in the bedroom ? Ask our friends in California.
Given my experience in Britain, I concluded that there are two critical areas to NEVER give ANY ground on.
1) Allowing the Government to define what are or are not "good reasons" to own guns.
2) Allowing any type of gun registration.
One last point - once you lose freedons you hardly ever get them back. Don't make the same mistakes we did... fight now and keep fighting. The gun-banners have all the time in the world to take our guns away. Once we lose them, they are gone forever.