Perhaps you should read the Australian copyright act then given you live in Australia. You are not allowed to share a photo just because you like it.

"The use, reproduction or dissemination of copyrighted material by someone who is not authorised to do so is a breach of copyright. To avoid infringing copyright, the owner’s permission must be obtained.
In the case of unauthorised usage, the courts may award penalties or remedies for the damage caused. These include:
• Awarding damages for any losses suffered;
• An account of any profits made by the user;
• Delivery of any copyrighted material, including its destruction; and
• Injunctions to prevent further use of the material."

http://www6.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/ca1968133/

Given that you reproduced the content and steemit has a monetary reward system your clearly in breach of the act.