Thanks everyone for your comments, I am not mean to get any bad atmosphere here. Everyone is very friendly. everytime I met a fisherman, they were just so nice.
I did confirm with my friend, they went to a hot spot fishing last fri night. It is a public entrance. It was scarer at he told me it seemed that guy was not a fisherman. He just want to target a fisherman.
So still as the title of post, safety is always the 1st.
If you want to go, get several friends together and leave before the dark.