On the issue of amateur photography in National Parks.
I am an amateur photographer who several years ago I had a similar encounter when photographing a female glamour model at Upper Seletar Reservoir. We were in a quiet spot near the waters edge when along came a solitary NP Ranger on a motorcycle. His manner was unpleasant to say the least, demanding to know if I had a 'permit' to take photographs in the National Park? Obviously I did not, being completely unaware that I needed one! He didn't ask for my IC but told us to cease taking photos and leave. He continued to harass us as we packed up our photographic equipment and left the area. I never did check to find out whether he was telling the truth about the need for a permit, but strongly suspected he was envious of me photographing a glamorously attired beautiful young lady in the nature reserve!
Considering that the NP Rangers are civil servants paid by us tax-paying citizens surely we might expect a modicum of courtesy. We need to get to the official verdict on this alleged 'No photography' rule.
To quote their own website "National Parks Develops, manages and promotes local parks as valuable resources for recreation, conservation, research and education". Listed under Nature Reserves one of the activities listed is PHOTOGRAPHY!
http://www.nparks.gov.sg/cms/index.php?option=com_visitorsguide&task=activities&Itemid=81#div_parks
I believe the Rangers you encountered were jealous of your female companions and have thought up this 'No Photography Allowed' line just to spoil your day.
Oh, by the way, I really liked your images.