The woman's arrest and public shaming yesterday was the latest of several such incidents since King Bhumibol Adulyadej died last week after a reign of 70 years, plunging Thailand into intense mourning.
Two police officers led 43-year-old Umaporn Sarasat to a picture of Bhumibol in front of Bophut police station on Samui, where she knelt and prayed, both on the way into the station and the way out.
"We are going to proceed with the case as best we can," district police chief Thewes Pleumsud told the crowd. "I understand your feelings. You came here out of loyalty to his Majesty. Don't worry, I give you my word."
Authorities are also urging calm as social media throbs with criticism of people who aren't wearing black and white clothing to mourn the revered monarch and some arch-royalists take to reprimanding people in public. A government spokesman said some Thais can't afford mourning clothes and urged tolerance.
Several foreign governments have warned citizens traveling in Thailand to avoid behavior that could be interpreted as festive, disrespectful or disorderly.
On Friday, police and soldiers on the Thai resort island of Phuket dispersed a mob of several hundred people seeking a confrontation with a man they believed insulted the king.
Thailand has draconian lese majeste laws that impose stiff prison sentences for actions or writings regarded as derogatory toward the monarch or his family.
The operator of Thailand's main cable TV network has blocked foreign news broadcasts deemed insensitive to the monarchy since Bhumibol's death.
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