Now, there is a reasonable response to homeopathy. I will agree that "Like cures like" is not a generally proven principle, it is the basic idea behind immunization. You make a formula that is like the disease and inject it into the patient, and their body develops an immunity to the disease. Now we can split hairs and say that gaining an immunity to a disease is not exactly the same thing as 'curing', but the basic idea of "like cures like" is in wide use.
Now, I am not prepared to rely on anything labelled "Homeopathy" to give me any kind of health benefit, but there is a vocal group on Slashdot that jump to calling it quackery by taking the most bizarre aspect they can find and making that the single point that describes the entire idea. If you want to call out a subject as quackery, being dishonest about what it is doesn't make the case.
Even worse is when they group homeopathy with chiropractics. Where as homeopathy "is not a generally proven principle", chiropractics IS a generally proven principal. It has easily explainable and reproducible benefits. In fact, when it comes to chiropractics, the exceptional claim would be that it doesn't provide health benefits, since it is an exceptional claim to say that putting bones in place that had previously been out of place has no health benefits.