Arab Mafia, in Australia there are several groups.
One of them, they call it Comancheros.
Many libanese guys join with Comancheros, i.e leader John Ibrahim, Mike Hasheem, etc. They deal with shark loans, money laundry, illicit drugs, theft of ID passports, fake documents, killing, etc
They are very strong. However I regret the Australia Federal Police work, that is so discriminative among the chinese triad, comancheros, and dirty business people.
They don't catch Comancheros, even after they have known their activities for 15 years. However they catch, bully, suspect more East Asians compared to Arab, Mideasternes, etc etc.
I don't think Australia is good place to migrate anymore for East Asians.
And I regret more why chinese keep saying and hate Japanese, as the same East Asians, we should more unite for the good things and good purpose. While the mideasterners they unite very well, even they might sneak out from the law charge of Federal Police of Australia.
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)ﾂ The avoiding them would probably mostly 窶啾窶壺?ｦ wise just so you dont see something you shouldnt ... 
ﾂ I'm pretty sure I saw a Yakuza guy when I was on an Osaka train one day. He was middle aged, rather drunk and started scratching his leg lifting up his trousers a bit to reveal SOLID leg tattoos. The Japanese are still really cautious with tattoos (have one and sometimes you wont be allowed in a public bath - you can lose your job etc) Yet this man couldnt care less. He wasnt jumping around the train carriage violently or anything - he was just minding his own business.
