It's repugnant to be flippant about making someone suicidal.
John and Jill are at a party and John knows Jill has a crush on him but doesn't like her in return.
John wants Jill to leave him alone.
John sees Jill and explains to her that while he's flattered she's interested, he doesn't think he's suitable for her.
John sees Jill and quickly tells Jill to get away from him because she's hideous.
Jill is happy that John treated her with dignity and respect, and retains her feelings of self-worth.
Jill is devastated and so emotionally distraught that she considers hurting herself.