Even when not banned, isn't civil asset forfeiture (aka cops robbing people) mostly practiced in the South, and in known corrupt shtholes like Chicago/Philly/NJ etc?
Given the inter-state nature of many of the seizures (cops always pick on out of towners) I think this'd actually be a good place for the Feds to step in. Armed robbery is not covered by the 10th Amendment, and "people who aren't from around here get robbed at gunpoint" seems like the sort of thing that'd legitimately affect inter-state commerce.