Another reason to forego flip-flops at work

Reader Jenn writes:

I just read your "What (Not) to Wear to Work"...I'm located in San Diego and a handful of employees here recently completed last weekend's Rock and Rock Marathon (including our President). As such, "dressy" sandals have been permitted in the office, until today. Today, one my colleagues lost her toenail while wearing sandals due to excessive running. It was found on the office floor. So disgusting and even more reason to ban flip-flips at work despite our close proximity to the beach and the fact that they are the only shoes I wear on weekends.

Ewwww.