No, it won't do that. First people will just say this was an accident or a mistake and learn nothing at all. You will just look like chicken little.
Second homeopathy isn't dangerous - call it that and you will be the boy who cried wolf (I'm in a fable mood today I see).
And third it's not really a scam, it's a placebo. Placebos work very well, and there is an unfulfilled place for them in medicine. (Sorry, can't think of a fable for the third point.)
I take your point about the value of placebos, but homeopathic practitioners don't have a monopoly on the placebo effect. And homeopathy diverts people from effective medical treatment. This kills people.
And these safety incidents aren't accidents -- they're an inevitable consequence of people taking unregulated substances as if they were medicines. When people swallow these preparation, or drop them in their eyes, or shove them up their nose or their ass, I don't think it occurs to them that nobody has checked whether this is a safe thing to do. I think they should be made aware of this.