I've just read from the start if this thread and I honestly just can't believe the s**t these people have pulled!! It's disgusting! I'm so sorry you have had to put up with this kind of c**p.
I think your plan sounds like the only sensible thing you can do..,and I can totally understand you wanting them to out the final nail in their own coffin! After all this time you just want it to end.
All the best x