Since BossyCow is a volunteer I seriously doubt if SHE would be attacking them. She is probably just reminding them since she is looking out for their best interests...as always.
Volunteers may leave whatever they are doing to go to a scene. Since they may go to more than one scene each day and return to their POV each time, it could be easy to forget about the shoes.
After 30 years, I have yet to wear my scrubs or flight suit when not on the job. I am totally disgusted by any healthcare worker that goes grocery shopping in uniform after a shift of patient care.