funny I have been living here since 99 and haven’t seen that. You must have some inside sources, but I doubt it’s true. I’ve flown in and out of Bangkok hundreds of times and never been flagged. I just walk through like I own a place.
There’s a farang living here who killed his mom, slit her throat and he’s living here and everybody knows it. The farangs and the Thai government. Then he got here and whack somebody with a beer mug when he was drunk in a bar. Didn’t get deported. Don’t worry about it. It’s no big deal. 
There’s a Canadian who has been living here for years who murdered his mom. He stabbed her a bunch of times and then slit her throat. Then he went to prison in Canada for many years before moving here. The Thai government knows about it and so do all the expats. I think that’s worse than a DUI conviction.
Back in 2006 my wife got approved for a 10 year tour visa and we were married. No one could believe it. It does happen and it depends on how well the interview, if they dress appropriately, and if they have a history of travel to other countries.
I have five successful franchises in the US and rental properties. This is what I found out. I’m not paying tax in Thailand. I’m enjoying life here. I wouldn’t do business here and that’s different if you are. We are not talking about that.