If a white person shoplifts they're no longer white in my view.

Only in high trust white communities can you have shit like pic related, among other benefits like virtually no litter, fly tipping, theft, rape, vandalism, et cetera.. It's like living in Hobbiton, but it only takes 1 thief in your neighborhood to ruin everything. Thus if a white person behaves like this it is like "diversity" has been introduced to the community and they are effectively no longer white.

Is it possible for road stands like this to exist in nonwhite societies?

Most of north America is asleep rn so browns do you practice the honour system