How does something that is a precursor to firearms confiscation hurt you? You have to ask? I suppose that if you do not own firearms then it doesn't hurt you? If you have some absurd notion that no government in the whole entire has ever turned on it's people or that even in this country a fire arm registry has never been used to confiscate firearms then sure you might have some delusion that a firearm registry will not hurt you.
GunCite - Gun Control: gun registration;firearm registration
New Zealand has had some form of firearms registration since 1921. In 1974, all revolvers lawfully held for personal security were confiscated. (Same source as previous paragraph)
In May of 1995, Canada's Bill C-68 prohibited previously legal and registered small-caliber handguns. Current owners of such guns were "grandfathered," which means the guns are to be forfeited upon death of the owner. Bill C-68 also authorizes the Canadian government to enact future weapons prohibitions.
On 10 May 1996, Australia banned most semi-automatic rifles and semi-automatic and pump shotguns. Prior to this law, many Australian states and territories had firearms registration. Owners of these newly outlawed firearms were required to surrender them (with some monetary compensation). All such firearms are to be confiscated and destroyed after a 12-month amnesty program. Roughly 600,000 of an estimated 4 million Australian guns have been surrendered to authorities and destroyed.
"Since 1921, all lawfully-owned handguns in Great Britain are registered with the government, so handgun owners have little choice but to surrender their guns in exchange for payment according to government schedule...The handgun ban by no means has satiated the anti-gun appetite in Great Britain." (All the Way Down the Slippery Slope: Gun Prohibition in England and Some Lessons for Civil Liberties in America", Hamline Law Review, 1999)
Even in the United States, registration has been used to outlaw and confiscate firearms. In New York City, a registration system enacted in 1967 for long guns, was used in the early 1990s to confiscate lawfully owned semiautomatic rifles and shotguns. (Same source as previous paragraph) The New York City Council banned firearms that had been classified by the city as "assault weapons." This was done despite the testimony of Police Commissioner Lee Brown that no registered "assault weapon" had been used in a violent crime in the city. The 2,340 New Yorkers who had registered their firearms were notified that these firearms had to be surrendered, rendered inoperable, or taken out of the city. (NRA/ILA Fact Sheet: Firearms Registration: New York City's Lesson)