Nothing wrong with going out at night, just be careful about certian places like parks, gardens, trees and rivers etc... its nothing to do with bravery, its better to avoid those places at night.
because like Allah (swt) said "Darkness gathers evil"
Its not even all fear and horror it could be that you accidently harm a jinn.
i remember once we went to a wedding hall to help out at night, and my younger brother went the back and started throwing stones cos he was board... except it was at trees... my heart jumped to my throat and i grabbed him,
i gave him a well grilling. He was compleatly oblivious of how dangerous his actions were..