Is anybody at DL aware of how many passengers it is alienating with the rinky-dink puddle jumper operation at JFK? A family member had connecting flights to SYR from JFK cancelled for MX reasons and got stranded at JFK 31 Oct - 1 Nov. No other alternatives were offered, not US out of LGA, not CO out of EWR, not B6 out of JFK. I can understand the latter because there is no agreement between B6 and DL. In any event, this family member vows to never fly DL again.