Yes. No one is wrong, persay, but there are ways to do it and CYA. Don't answer the phone as you are about to flare, then brief the FO and cabin crew that interrupting the landing sequence at that point constitutes and emergency situation and your reaction of landing was correct and allowed you to deviate. Then if anyone asks questions, it's set in stone. Tell them to feel free to call and that above a certain altitude, you might/will answer it. Then there's getting the police involved because a passenger isn't following instructions (apply probably on a case-by-case basis). Do these things, file the associated reports, and the problem will be come known and addressed. Ignore it and it won't get better, in fact, someone will probably get burned at some point...