I just playing into the lore plus this event was hundred plus years before DS9... So maybe section 31 could not identify xiniti species with a tricorder at that time...
You are making my point that Star Fleet better worry once that probe/drone informs its home world about the dire straights whales are in on earth. Think, once they compare their earlier scans of earth with the scans from the probe/drone they will see a planet had a mass extinction invent with so many animals species missing from the early scans. They may conclude humans are an invasive species that must be stamp out. They may conclude humans must be wiped out throughout the galaxy. So Star Fleet and UFP fans be worried real worried...
I always felt if the Aztecs had met the conquistadors on the beach things may have been different...