The reason these were piled up is probably due to the owners leaving town, and leaving their crappola on the beach. Your burning it would do nothing, except emit toxic fumes into our atmosphere. I guess you still burn tires for your campfires in MS? 
why, of course! it get's rid of the mosquitos! :razz:
just kidding, we retread them and use them on our cars! :twisted:
toxic fumes not withstanding, perhaps it would be a warning to the others
but I bet they said "we'll leave them for somebody else to use" and felt good about themselves as they walked away
if everything left unoccupied overnight were torched, the County would have to act, which they wouldn't if the items just disappeared.
so if we can't burn them...
how about processing them CSI style and sending the owners a bill
maybe a grand per item?
'local company gets big contract for beach cleanup and forensic processing'?
'said to have huge prospect for additional county earnings (and clean up our beaches)'?
like that planet in 'hitchhiker's guide' where the difference between what you consume and release comes out of your fleshy bits
or we could just let the TDC worry about it - they sold out to these people
or we could retreat the houses back, force the oily cars and suv's off the beach and make the beachgoers lug their trash under armed guard
you live there, you decide