[PM_me_your_math]

The tracking account used an API to track his family's movements. It didn't use an antenna per se.

If I did that to you, you'd be pissed.

[rbanffy]

If I own a plane and you track that plane, there's nothing I can do, since that information is public. Websites that publish that data through an API are publishing data they got from the aircraft itself.

There's a number of ways one can avoid being tracked and Elon saying there aren't is a blatant lie.