From what I understand, Oregon passed food safety laws that effectively prohibited sprouts at restaurants, for the sorts of reasons you describe. A sandwich shop that I frequented put sprouts on most of their sandwiches, and then one day they were gone.

Sprouts are a raw food. They are safe as the conditions raised and handled. Sprouts you grow yourself with sanitary procedures from certified seeds are extremely unlikely to cause any problems. Sprouts grown at scale and shipped through a network of distribution channels before being consumed… yikes.