That's been going on for many years, A farang I knew his wife used to rent bikes them lose them gambling she got run our of town,
Years ago we had a shop on the main road with a large forecourt, a Thai guy approached us asking if he could use the forecourts to rent bikes and a couple of cars, he said the very same thing don't rent to Thais, we didn't take up his offer,
I have known people here who will not rent property to Thai's and thats Thai owners 555,
If you want to talk about racism you should speak to the Burmese,