In Australia, the ONLY way a visa can be cancelled is by immigration...I partner cannot just get the spouse visa cancelled..there is a due process to ensure fairness..
That's entirely untrue. I met my now Thai wife on TF, almost 4 years married, we live in Australia, she has a PR visa, works 5 days a week and contributes quite well to our living expenses. I will admit quite a few are as you say...but how many "genuine" farang men are on TF?