"Baby on Board" signs
I got two of them at my shower, and I'm glad that we did, but DH thinks they are so silly.
He thinks it's basically a sign saying "Don't purposely ram our car, which I know you were planning on doing anyway."
I think it can't hurt to have it, but I do kind of see his point. It seems like one of those things that really isn't very necessary but has been made a staple in this crazy baby industry.
...unless you know of any research/statistics saying that it helps to have them! LOL.