How come UFO's have never created a sonic boom? That we know of anyway

Because they manipulate space time for propulsion rather than kenetic force. This creates no noise. Its not really moving its just super positioned in different points through reality until it gets somewhere

Scalar energy may be the reason

Technology

My guess is they can bend space and time.

First we to prove that any random unidentified phenomenon we perceive as flying through the sky is [i]actually[/i] an extraterrestrial vehicle, then we can start spitballing around [i]physics-defying[/i] shock wave suppression technologies

.... never mind spitball as to why a species [i]capable of interstellar travel[/i] is just sooo improbably [i]sneaking[/i] around our planet, rather than very unambiguously letting us know of A) their arrival and B) most likely our expected global submission to a species [i]capable of interstellar travel [/i](yeah, it doesn't make sense that anything capable of that would be keeping it a secret, obviously they would have the capability of doing anything they like with us)

It's very helpful to remember that all "UFO" actually means is literally "[i][u][b]unidentified[/b][/u][/i] flying object" — not alien spaceships from multiple light years away, which is the minimum distance to another possibly inhabitable planet

We have to suspend a lot of disbelief and critical thinking to just automatically make the leap from "I don't know what that is" to "oh obviously that is little green men in flying saucers from beyond the Milky Way"