Time to give the guns back to the Aussies.
How about HELL NO. Have you heard of the Cronulla riots? I wouldn't be surprised if there is a repeat of that if any terror attacks aren't prevented, sadly. (Though I hope we've learnt from that.) Add in bogans with guns and there's a catastrophe just waiting to happen.
Also, how would guns help protect you from getting stabbed on the street? Even if you carry it on you, you aren't going to be able to react in time. It's not like they're going to brandish their blade from across the street and charge at you.
Also, what's one of the most popular weapons terrorists use? Bombs, which guns are completely useless against.
Honestly, the gun control measures was the best thing that Howard government did for Australia, and if you're Aussie yourself you must be blind not to see how much safer we are now because of that, and how much our society has benefited. If you're not Aussie, you should actually look up the history and gun crime of Australia.