Summary of the day's events:
- Went to a local event (swap meet).
- event parking is limited so a lot of it spills over into surrounding lots. Including where I parked regularly.
- Noted at the time no one was there but attributed it to less-than-stellar attendance.
- Came back to find my car not where I left it.
- A police officer happened to be there assisting someone else (who I assume had the same experience).
- Found I'd been towed to an impound lot which was luckily (for the tower, anyway) only a block down from the event.
- Retrieved my car at my expense.
And before anyone asks, I have no interest in taking this to court or disputing since "Well they never enforced it before" will probably not hold up and I can't exactly say the sign wasn't there. Money out of my pocket and lesson learned, I guess.

What me and the other guys I walked down to the impound with can't figure out is why they suddenly started enforcing this after years of people regularly doing this.

So my question is: What was your first experience with having your vehicle towed and what were the circumstances?