The scam only came to light when her domestic helper got suspicious.
The trend appears to reflect attitudes towards the city's recent political events.
“Beneath the umbrellas there is an idea, and the idea is bulletproof,” reads the side of the mural.
"We are worried about the slow erasure of our Hongkonger culture," one activist said.
The mother chased her terrified son, splashing hot water on his back.
A riot police teddy bear is also available for pre-order.
Authorities earlier found the restaurant's hygiene standards to be satisfactory.