I have fed them but I did remove the teeth first of all as I agree they are very sharp - might not be necessary but it made me feel more comfortable. I have been feeding raw for about 7 years now and salmon teeth and some of the sharp fins on other fish are the only items I have ever worried about feeding.
I have been gifted some by a very kind fishmonger and ended up just giving it to Nando as-is. He is quite big and he even found it hard to eat. He was exhausted after it, but he absolutely loved it. I couldn't believe the size of it!