By right should seek their permission first. but since you
already photographed, I suggest keep it to yourself and don't post.
There's a recent newspaper article from The Straits Times about
NSmen photographing while in army and posted in their blogs, and
were warned by MINDEF. MINDEF requires clearance from NSmen before
being allowed to post any pictures about NS in the Net, because
potential terrorists may be gathering such pictures from the Net
and all these tiny bits of info may turn out to be advantageous for
these terrorists!
IMO,as long as one uses it for hobbies and not intended for any
harm; that's good enough.
