Yes, the sharks have always been a real worry, while out in the water. The mid north coast of NSW has been bad of late for shark attacks. I'm in the Newcastle area so not many problems.
One of the main problems with surfboard riding, is it has become very popular and the surf gets real crowded and it's hard to get a wave to yourself these days. Parking is also becoming a real pain as well, if you don't get to the beach by 8.30am forget about a close parking spot.