A potential solution to this is to hand your boarding pass for the next leg to a gate agent as you get off the plane at your intended destination and say that y

A potential solution to this is to hand your boarding pass for the next leg to a gate agent as you get off the plane at your intended destination and say that you will not be boarding. The gate agent may threaten you with consequences, but there's really nothing they can do; it's not like the TSA is going to force you on to a plane.