There's been talk amongst Police Departments in whether investing in wide scale wastewater monitoring could help locate drug dealers/labs. Personally, I think this is a huge invasion of privacy, but since wastewater is a "public good" police currently can do whatever they want with it (source: I work in a wastewater testing facility).
As easy as one bad actor flushing the wrong/right stuff a few times (stuff that is known to be monitored, say a specific infectious agent) in a few public toilets across a city, and waiting for the reports to trickle in. More of a fanning the flames rather than starting a panic, since the threat would have been well-known enough to have been monitored in the first place.
So maybe keep those waste reports on a need-to-know basis, rather than broadcasting a public “daily waste report”.
What else can our waste tell us?