Completely unrealistic patients

How on earth are you guys managing these people? I work in the public sector and the absolute entitlement and unwillingness to listen to advice is insane. Today I had a patient who declined any exos with a mouth that required full clearance (all root stumps). Discussing this led to me realise he wants a full set of crowns, think Turkey teeth he saw on instagram. Advised not a feasible treatment option in the most diplomatic/educational way I could. He then wouldn’t leave the chair and became highly aggressive, had to call security etc. Are there any techniques or tips to work with these sorts of patients? Kind of sick of having some corporate idiot ask me if “I acknowledged the patients feelings and really listened to them”. Like no you’re so right I never thought of that.