Sonic hedgehog is a key protein in developmental biology, so it's not terribly surprising that it pops up from time to time in the news.
Fly geneticists named a class of proteins "hedgehog" because when they mutated the genes responsible for their production in flies, the insects adopted a spiky appearance. As the wiki article references, there are other hedgehog proteins such as indian and desert.
Also, people who complain can shove it. I bet if you guys discovered anything you'd name it after some boring-ass Greek or Latin shit so it sounds like you're LARPing a magical incantation every time you describe a biochemical pathway.