This could possibly cause the opposite to the desired effect. Tailgating (hey! let's see if we can drive inside of and stay in the beam!), people putting high beams on in response to what they perceive as "arrogance" or at a minimum, annoyance, or other questionable driving activities. And as a distraction from maintaining a full surround field of view of what's going on while driving, I think its definitely dangerous.
Is it even legal? Is it like a floodlight on the back of a car?
In the past its been proven things that make you stand out on the road, especially anything that sends a message to the effect that "I'm better/more important than you", is not wise as it may occasionally cause a response.