Beaker has alerted me to this Darryl Cunningham cartoon which is critical of homeopathy. (You may have seen his earlier cartoon about the MMR.)
He points out that homeopathy is ineffective, and dangerous when chosen in preference to real medicine, which (surprise!) is the preference that homeopaths will steer you toward. I like how he explains not only why homeopathy doesn't work, but also why people feel like it does.
He's also included a bit about Penelope Dingle. I hope this retelling of her story helps to prevent others from following her course of action.
I confess it still puzzles me why Peter Dingle seems to have no particular qualms about homeopathy. If I'd been through what he's been through, I'd be trashing it even more than I currently do. But then I'm not overly invested in quackery, so that may be where we differ.