Hello smiffy, read it- oh you poor thing you sound so worried :-(
Like one of the posters has already said, as tragic as the recent news is, it'll be a 2 minute wonder (lets face it, more pressing news happening- Big bruv is back on TV for a start(!) )
I genuinely don't see a problem with you and your dog, you sound like a responsible owner who can see a potential problem and has taken great steps to prevent it to the best of your ability.
The real problem we are faced with are not the dogs themselves but their evil owners, I'm usually completely against capital (or is it corporal?) punishment, yet I'd have no compunction in seeing these monsters get their just desserts!
All dogs have the potential to snap and bite, I myself have a jack russell cross and he can be a nowty bu88er at times, but if we are fully aware of what they are capable and take steps to prevent it, we'll be fine.
I seriously doubt the 'fuzz' will be pounding on your dog to take your beloved dog away.
Take care
Boo