Over the past few years, there have been a number of deaths caused by unprovoked one-punch attacks ("king-hits", or now "coward punches"), possibly the highest profile being the death of Daniel Christie[0] after being attacked in Kings Cross, a hotspot for nightlife.
In the wake of these attacks, a number of new regulations and laws have been passed, with the stated aim of reducing alcohol-related violence. These regulations had been tested previously in Newcastle, the aforementioned deaths being an opportunity to pass them swiftly in Sydney.
Despite the supposed good intentions, there are a number of things that people question about the new laws, such as that the new regime is overcomplicated and often just silly (see anecdotes in this thread), or the rather suspect exemption of the local casinos from the laws, despite suffering the same problems[1].
Additionally, some people would argue that the response has been disproportionate to the actual problem - this infographic[2] from a violence support group[3] claims that there were only 20 deaths attributable to this kind of attack between 2007 and 2012.
Personally, I'm somewhat of a homebody and haven't been directly affected by the changes in the law, but I do consider them an overreaction and lament the effect they've had on Sydney's nightlife in general.
Having read the article in it's original location[4], where the author provides more figures to support their allegations, I was left feeling rather bitter about the whole situation, though I do agree that it was written extremely emotively and was intended to elicit that response.
On behalf of the other side, though, I would offer this[5] video clip - it's from this week, showing the Senior Australian of the Year Gordian Fulde responding to a question about the lockout laws, for which he was a strong advocate.
[0]: http://www.smh.com.au/nsw/daniel-christie-dies-following-kin...
[1]: http://www.smh.com.au/nsw/star-casino-may-be-the-most-violen...
[2]: http://opck.qhvsg.org.au/wp-content/uploads/sites/38/2014/09...
[3]: http://opck.qhvsg.org.au/
[4]: https://www.linkedin.com/pulse/would-last-person-sydney-plea...
[5]: https://www.youtube.com/watch?v=dDwoqkmZULI&t=40m55s