Demo Derby Drones

My idea is a demolition derby but using flying drones. Literally, they just crash into each other and the last one flying wins.

Any number can start. Like a traditional demo derby, half of the drones can start on one side and half on the other.

This can have separate divisions with different cost controls, sizes, and speeds. Also, there should be a division with a single, inexpensive type of drone so that anyone with a few hundred dollars can participate in at least one division.