If you don’t It ends up in landfill. There is a myth out there that it goes to charity, it’s not true. To go to charity it would need to be spotlessly clean and the charity workers would need to be able to pack the tents properly. The people that leave the tents don’t leave them in good condition and are just lazy ignorant horrible wasteful people. It’s disgusting - the people that do this are disgusting. Glastonbury and other festivals should be telling people it goes to landfill and to stop doing it