I think it depends on what it's trying to say. If it's in your face I'm better than you, then it warns the rest of us that the owner is a wanker,so keep away.
I don't think that mine is to show-off-look-at-me. However, I could be wrong.
Interestingly. I originally asked if "1977" was available, the computer said yes. But when they went to order it, all "years" are reserved by the Federal Gov.......