[simias]

That's not saying that "80% of Waze users are cop killers" though. Just that some people could use it to locate cops in order to attack them.

I don't know if that makes really sense but it's much less outrageous than what the OP implied.

[JelteF]

I think what the OP implied is that things will always be used by criminals for other purposes than intended.

[Alupis]

I think it's more likely to be used on the commonplace to avoid areas with police -- either for the traffic ticket dodger, or for mugger's, home invader's, etc...