I'd want to go there wearing a full set of shiny platemail and allow them to attack me with their stone weapons all that they want. After letting all of them completely exhaust themselves, I would be regarded by them as an invincible god. Then I would be in a position of absolute power. I would demand all the coconuts and run away giggling.
"They are actively hostile to unknown intruders requiring frequent shows of peaceful intent before allowing outsiders to COME INTO ARROW RANGE." (caps mine)
Awww, but then you can watch the natives go on all kinds of crazy adventures involving bumbling but loveable biologists, bumbling but loveable guerilla revolutionaries, and the evils of white capitalist society! Bet you could even make a film out of it, too.