Your tall opaque robot is now illegal

[rich2202]

The problem with the question is that the GDC is trying to be sensitive to R9, blue box A and C

A. Shields, curtains, or any other devices or materials designed or used
to obstruct or limit the vision of any DRIVERS and/or COACHES and/
or interfere with their ability to safely control their ROBOT

C. Any devices or decorations specifically intended to jam or interfere
with the remote sensing capabilities of another ROBOT, including
vision systems, acoustic range finders, sonars, infrared proximity
detectors, etc. (e.g. including imagery on your ROBOT that, to a
reasonably astute observer, mimics the retro-reflective features of the
TOWER described in Section 2.3.1.3 TOWER

So, if the purpose of a robot piece is to block cameras (limit the vision), then it is a violation of R9.

If the purpose is to block shots, then that is ok, as it is an obstacle that robot designers are supposed to take into account.

So, put up an opaque piece of fabric that is supposed to interfere with boulder shooting, and you are fine. If it happens to block vision, so be it.

The rule is intended to prevent a defending robot from intentionally shining a flashlight directly into the camera of the other robot.

As they say: Bad cases make bad law.

Just make sure the robot piece has a purpose other than to interfere with sensing capabilities of the robot.

That'll then go on how the LRI or Head Ref interprets the response by the GDC.

IMHO: As an R9 call, that is solely in the LRI's court. In general, G's are for Ref's, and R's are for RI's.