This makes me want to go to the nearest cell phone store and set the username on all the iPhones to Shithead. No no, you've just mentally pronounced it wrong. It's a real name. Shi-thi-add or something like that. Bad words are blocked on a lot of devices. That one tends not to be since it is a legitimate name. Most talking devices are not smart enough to pronounce it correctly leading to amusement. Try it on older phones too! Program it as a contact, do the voice commands option, and your phone will read it back to you probably pronouncing the name wrong. Hilarious for a while!