Go and hang.out at a back street muay Thai gym for a few days. Not the fancy tourist places. Get to know them a bit and they will treat you like family. Tag along to a fight night ... temple fairs are great ... It's a good way to see interesting Thai life without being ripped off.
Only a matter of time before immigration reject tourists due to photocopy documents being landscape instead of portrait, passport photo on wrong colour background.etc etc etc 555