Personally, I prefer the term "prohibited items" to contraband. Contraband can include those items which are illegal but are not covered by TSA's mandate, such as drugs and stolen property. If TSA happens to accidentally discover such things during the course of their searches for WEI, then certainly, they should report such discoveries to LEOs, but those discoveries should not be touted as wins or accomplishments by TSA, since that's not what they're supposed to be looking for.

The real question is, how many times has TSA discovered the stuff they're actually supposed to be looking for during gate screenings? And additionally, when they do discover prohibited items during a gate screening, how do they explain how those items were smuggled through the primary screening at the checkpoint?