"Refund my money/and or provide a travel voucher for this schedule. - DC - NY to be used at any time. And review your policy in regards to this procedure."

When all is settled and done you are still wanting a free bus ride because you had to endure a smelly homeless person who evidently had his ticket paid for to (no matter who paid for it).

While I can sympathize it hardly endangered your welfare by any means. And if you thought so highly that it did, why you did not ask once you reached your destination for the free ticket?