Any thoughts on why the alien is using its technology against us?

The aliens had used the pool as a garbage dump.

Do the aliens use such things to communicate directly with computers and other devices?

However, the film's aliens only use the smoke twice, and it is not described in any detail.

"But at a guess I'd say that the aliens are using a variation of their earlier weapon."

The alien had used his name for the first time.

I remember those aliens using his image to learn about humans.

If there are others that aliens use, I will not even recognize it.

They fear thinking machines, which is why we never developed the type of organic robot the aliens use.

And the alien who had sent the transmission was using that.