When he sues, you serve him with a cease-and-desist written in Comic Sans that says, “This is a reminder that you are a background character in my story.” Then you file a counter-complaint: Noise Violation — because his entire existence is a low-frequency drone of entitlement. You let the building vote on whether he should be forced to wear a name tag that says “Condo Overlord (Expiring Soon).”
When he collapses under the weight of his own fraud, I expect a 10% cut.
How would you get him off your back? Distract him? Or neutralize him as a threat?
(Ethical or nonethical is acceptable)