Was there yesterday. Plenty of people in shorts, also locals who were engaged in worshipping rituals (hope that is the proper term). Also, plenty of children. No need to take off your shoes.

At Man Mo, taking pictures is allowed, but flash photography is prohibited. Other places like Chi Lin Nunnery prohibit all photography inside the halls, but there are big signs everywhere.

HK temples are pretty "easy going" to visit as long as one applies the same common sense as one would visiting Notre Dame