Last Monday evening I was stopped for a street check by an officer in the front of Ekamai at nine in the evening.
The officer searched my backpack, asked a few basic questions and took a look at the copy of my passport with the current stamp and I was on my way. There was no reason to feel paranoid - I obey the law to the letter here as I do in my birthplace.
I must say the officer concerned was professional, efficient and extremely courteous and conversed with me in my basic level taxi-Thai. Upon departing, we exchanged chap-meu and that was it - no different to a similar street check one would experience in Brisbane (yes, it happens all the time there too, but more likely with younger people).