Ground meat of any sort is dangerous as far as food safety laws are concerned and must be cooked beyond what is usually palatable to make it safe.
Usually, only the outside of a piece of meat can get contaminated, the inside is pretty much sterile until it begins to autolyze and toxins begin to form.
The problem with ground meat is that the outside becomes the inside and there is no way to wash away fecal contamination.
Everybody that's anybody grinds their own meat.
