I am going to employ this tactic, as I already have with Greyhound and Peter Pan to get cheaper fares on routes that have "transfers" in NYC - whether same seat or not, those transfers are often cheaper as separate A-B and B-C segments than if booked A-C.
I know you said there is no risk of missing the connection in terms of time -however, what is the boarding and reboarding procedure? Is there a risk of getting outted by the driver for trickery and booted off the bus at Binghamton, or sent off into the standby queue while the legit ticketholders take my seat?