If you don't want to check in to the local jails, don't bring illegal drugs with you, especially if you are arriving from South-East Asia or India. Customs in Australia allow you to bring in just about any article providing that customs are satisfied that they are for your own personal use and that you will be taking them with you when you leave the country. Animal and plant products are a big problem. Australia has so far been able to escape many of the agricultural pests and diseases prevalent in other parts of the world. Therefore customs officials are keen to prevent weeds, pests or diseases getting into the country.
Fresh products are also unpopular within customs, especially meats, fruit, vegetables and flowers.
There are also restrictions on taking fruit and vegetables between states. Most quarantine control of the time the government relies on your honesty, however there are a few checkpoints where you may be inspected. The carrying of firearms or weapons are either prohibited or require a permit and safety testing. Other goods that are not permitted are products that are made from protected wildlife species, live animals and unapproved telecommunications devices.