I've read the same thing before about cutting away the meat, but with one big differance. It's not the carbon passing through that poses a problem. It's when the carbon arrow breaks inside the animal/wound channel. That is were the problem lies. If you eat any of the slivers they will get in your stomach and do some damage because stomach acid cannot break the carbon arrow slivers down. So if you get a complete pass through I don't think you have anything to worry about. If you do not, just make sure you recover and account for all of the arrow.