Sure, people have property rights, which, in this case, they've stripped without due process. Or indeed, any process at all.

There's no way I'd carry a bank card in OK.

This comment[1] suggests that the product does not work with an actual bank card, only prepaid cards, which boggles the mind.

1) https://news.ycombinator.com/item?id=11865494

The article says "Now, the Oklahoma Highway Patrol has a device that also allows them to seize money in your bank account or on prepaid cards."

It wouldn't be the first time a news article was wrong, though it'd be nice to know for sure.