Among my friends we had a disagreement/confusion as to what the following sign means:
The sign is located on the top of the waterfall, but an access path to the bottom is nearby.
- No fishing due to risk of falling rocks (from the mountain)
- Caution when fishing due to risk of falling rocks
- Do not throw rocks down because of people fishing on the bottom (risk of injury/death to the fisher)
- Do not throw rocks down because of people fishing on the top (risk of disturbing the fish)
I think 3. is the most likely but I would like to find a more official source, or alternatively other similar signs at similar places to clarify the meaning.
Added from a comment: it is on the top level of the waterfall, but a path to the bottom is nearby.