They're not illegal over here either.
Surely you agree that owning a licence becoming mandatory would be a huge step in the right direction in the USA? (I accept it's unlikely because they don't want the "gurvermeant" knowing what guns they have etc).
I do. I was arguing against the strange fantasy I keep seeing about the licensing of guns to restrict their sale to conditions somewhat like the UK.
Anything that stops innocent people being killed is something that I'm in favour of, and whilst it isn't a silver bullet in gun crime (if you'll pardon the pun), having heavier licensing on guns and gun ownership will quite probably help in that direction.