No, but you could direct enough of it that anything left is too dim to see unless you've got really good eyes ("eyes" in this case being whatever sensors we're using to detect black-body radiation).

> someone will still see you if they are in the path of the beam.

Space is big. What's the chance that we'd actually cross paths with that beam?

On the other hand, space is big. That beam would probably hit something eventually, and I suspect in that case we might pick up a reflection.

> It appears to be an exercise in futility.

Assuming the point is actually to hide. Maybe instead it's an attempt to recapture some of that energy otherwise lost as heat?