It has nothing to do with the length or type of visa, or exemption, if they come to tour they will tour and go home.
If they come to scam/work/overstay they will come in and disappear..
Best thing that could happen is someone tips off Trump that Thailand places tariffs and luxury taxes on most imported goods..
Maybe he would threaten to do likewise...
Problem is if she gets tough so do they, it escalates until something really bad happens.
Her complaints to officials and police have fallen on deaf ears.. I wonder why?