Ethics. If everyone avoided talking to the police all the time, it would make their job more difficult, and they would be less effective. Their job is important, and so I would prefer that people talk to the police and make life easier for them. Therefore, to be ethically consistent, I too should talk to the police.
> If everyone avoided talking to the police all the time, it would make their job more difficult, and they would be less effective.
It would make their job more difficult, it doesn't automatically follow that they would be less effective. They might be as effective with less data if most of the data was noise, or be more effective by concentrating their efforts on fewer interactions and getting much better results from that, or become as effective or better by having to work harder. Or it might push them to develop different and better techniques.
