"We need to send a strong signal to the Thais," Just who are you referring to here? The soldiers making an a$$ of running the country or the Thai people themselves?
If the former, then yes, I agree with you, if the Thai people themselves, no!
Countries all over the world will have their share of scammers, especially in tourist area's.
I find that most of the Thai people are decent, and honest, but I admit that some of their behaviour has gone back a bit since the end of the pandemic, but not their honesty.