Poinsettia plants don't make you as sick upon ingestion as the myth claims, but some who have an allergic reaction to latex get sick just being around poinsettia plants. Do you experience this allergic reaction to poinsettia plants (or know somebody who does)? Symptoms include itchy throat and trouble breathing.
It's bad enough to learn you suffer from an allergic reaction to poinsettia plants upon receiving one as a gift. It's worse to discover that you have this health problem through exposure to displays of poinsettia plants at work or in apartment hallways -- where you may not have control over the matter.