Better yet, provide them with digital cameras. That provides proof of the incident, and allows soem trained person to identify the type of craft.
However, under no circumstances should the border watcher surrender his/her only copy of the photo. Make a duplicate before you turn it over the the Feds.
I agree. Thanks to improvements in technology, one can buy a high-res camera at a reasonable price. Also, I would urge that border watchers publish their aircraft pics on the web for all to see.