whatever you recorded in your camera, it belongs to you. there is no privacy laws in singapore.
if you're posting shots of people you dunno, the person can request you to take it off, but it's all up to you....and, he can go to a lawyer...as long as he got the $$$ or means to do so
if you're posting shots that shows the person in a very bad "light", or obscene, and thus caused certain damages to him, then you better reconsider...but it's your rights to post it...but you'll have to bear whatever consequences...if any
whatever you do, it's all about
etiquette...