> But all the charges were dropped. So it was an improper arrest.
Non sequitur. Every time I've ever stepped foot in traffic court, I've seen a line of people there to have their charges for driving without a license, or without insurance, dropped by showing the documentation they lacked at the time they were ticketed. To the best of my knowledge, no one has ever argued that this rendered their initial ticketing improper (except maybe libertarians who think the government has no business regulating traffic).
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."