They do care more now... the witch hunt on foreigners is on cause of many stupid incidents lately. And one thing is for sure... it's not fun to deal with the immigration here about any kind of wrongdoing... not at all... π
If you misuse the tourist (!) visa with the intention to work here illegally then it is clearly abusing/cheating the system. You shouldn't give questionable advices here.
Officially yes... even if the police it might accept sometimes. It's all about the combination "your license" plus IDP. What you can do is to apply for a Thai License, it's pretty simple with the documents you have.
Oh my... and again you spread wrong information...
The yearly technical check is only needed for bikes older than 5 years, not before. Talking about private bikes, of course.
These test centres do the check, they also sell the insurance to you and then they go for you to the DLT. And for that you pay them some extra money... that's what I call a "service". And because they collect some books before they go to Phuket you have to wait some days / about one week before you get your book back, right?
Example for a scooter up to 150cc... 100 Baht Tax, 60 Baht check, 323,14 Baht (basic) insurance... makes 483,14 Baht. How much do you pay?
Nope... it's not. You pay the tax at DLT (100 Baht) and before you need to buy an basic insurance somewhere... 324 Baht up to 150cc. There are insurance seller at the DLT but they don't belong to the government.
Nope... the basic insurance doesn't come with the tax, you need to buy it before you can pay the tax. Everyone can pay tax/insurance, it doesn't matter what name is in the greenbook... nobody ever ask who you are at DLT and/or insurance shop. For change the ownership you also need a copy of ID/Passport from the seller, if the seller is a foreigner you also need a copy of a valid(!) visa stamp. The official timeframe for change ownership is 14 days... but hey... TiT... π