Also the article is an iPhone ad.

It’s making search engines useless, for one thing.

I don’t think they can recognize the flyswatter, but they do seem to find a sudden increase in movement around them suspicious. Move slowly and strike from close up.

This actually brings up a good point that I never thought of before–it seems likely that if aliens have a religion, that religion will become a source of instant fascination to humans and will likely shake up Earth’s religious landscape a lot more than the simple existence of alien life would (alien life simply existing would not have much of an impact by itself IMO).