Radar sensor will go off anytime something is behind the car, a bike rack etc.

Tapping into the wires is not "hacking".

You are adding a sensor wire to detect when the light is energized, then the powered relay module sends 12vdc to the trailer lights.

Seriously, it's not a big deal.

(I'm a computer and electronic technical service manager. I work on million dollar systems every day WAYYY more complicated than trailer wires.)

BTW I installed my own hitch too.