I once passed on shooting a fawn in Wi. Needed an Earn a buck tag. The next day a giant 10 point walked by. I didn't have my buck tag. Would I shoot the fawn next time? In a heartbeat! Great table fare too. And you can buy unlimited antlerless tags.
BTW, Jeff is absolutely right. We need to get the terminology right to know what the other guy is talking about. A Fawn, is not a yearling!