An alternative would be to change the end that they are operating from too.
I've heard an observer will kill you for this regardless of reason.
Eg. almost unplayable mudbath on an ARs line. Ref puts ARs to RBs. Observer negatively reported on it. Ref appealed and the observers remarks were upheld by the FA.
Now this was a second hand story told to me by a referee that was asking me to stand in ankle high mud during a rain storm. So could be entirely untrue but I believed it.

