Thanks so much.  There are three things I'd wanted to do with point at, and maybe they are all actually doable in some manner.

Pneumatic pistons.  This one seems the easiest, I was going to use two proxy objects at both ends and have both parts of the piston point at each other.

Sun facing solar panel.  This seems doable with a script.  I am not clear though how point at works with infinite lights since they are defined by a direction rather than a location.

Billboard trees, fire and smoke.   Also apparently doable with script.