You had a Thai friend that had a court ordered payment and started using a family members bank account to avoid paying money? Doesn't sound like high quality redeeming qualities.
a culture that not only has no accountability, but goes out of its way to avoid taking any, to the point where you can get sued for questioning anyone or making any claims. Also, if you bring any of these points up, you are often gaslit and told to "go back to where you came from" or have to hear some defense as to why this kind of behavior is acceptable...
the current crop of expats might stay, but for people that are considering Thailand, many of them will opt to choose a more accommodating place, like Cambodia, where not only does this tax thing not exist, but foreigners can own businesses outright. In 10 years, the authorities will be looking up and going "what happened to everyone"...they will have no one but themselves to blame.
it was even later than 2010. I stayed in the country from 2012-2014 on pretty much back to back to back tourist visas. When I switched to the NON O based on marriage in 2014, it seemed like those days were wrapping up.
that's where the issue might come in. If you are doing private tutoring "on the side" and it's not done under a registered business with a work permit for you, you are running the risk of running into some trouble. Now, not saying it will happen, but its always best to do things legit.