3' running lane violation on BB?

[RKBUmp]

NFHS case study Rule 8 Page 49. Ruling, If the umpire judges that the batter-runner interfered with a legitimate play by the catcher, she should be called out.

My question is how would this be considered a legitimate play? The batter-runner received a base on balls and is entitled to 1st base without liability to be put out. Im not sure I see a legitimate reason for the catcher to be throwing to 1st, especially with a runner on 3rd.

Based on the video, however, I see a real potential for a coach to abuse the rule to try and get a free out.

Dont have an ASA case study book and dont see anything regarding a walk and running lane violation in the rules supplements.