I have read about the airline's problem with people buying RT flights for a one-way trip, and the issues with that. But here is what I'm planning:

I am flying outbound from city A to B, and then returning from city B to city A,connecting in city C (where I live). I plan to just get off the plane in city C, abandoning the last leg of the return.

What are the (i) potential and (ii) likely repercussions, if any? Can or will I lose my FF miles or EQM for the trip? If it matters, I do have elite status.