I won't touch it with a ten-foot pole myself, but homeopathy does get people the placebo effect and that's "A Good Thing" (tm).
That our analytical skills have correctly identified that homeopathy can't really do anything and we thus have to resort to beliefs in the mind-body relationship and e.g. meditation to achieve similar benefits is actually too bad for us.... just popping some pills would've been a lot easier.
Homeopaths (and other pseduo science peddlers) make money out of people who are at their most desparate state by selling them lies.
Homeopaths are careless and other people die.
I would make an analogy to veganism. Vegans as a whole are more intensely interested and passionate about their health and what they eat than your average healthy omnivore. For that reason, they're also more likely to proselytize and promote their ways to others. It's my belief that in doing so they potentially bring harm to themselves and to others. Do I think they should be engaged in vigorous debate and their arguments refuted to the best of scientific knowledge? Yes, absolutely. But I don't think treating them as idiots or malefactors is well-deserved or productive.
No. Much like teaching religious stories as if they were the truth doesn't do us any favors. "So what there is no evidence it works? It worked for me." and then you have to undo the damage to what could have been a rational person.