https://www.jackiescrafts.com/images/kidplaques/babysleepingpp.jpg
I feel like they might be, a little, but at the same time, if I have a baby that's just been put down for a nap, I'm not too worried about that. DH and I both have family members that feel they're exempt from the call before coming over wishes we've expressed, and I'm really considering getting something like this.
ETA to change link
Re: Are these signs rude?
Part of me doesn't like advertising that there's a baby in the house, either, which is one reason I'd be hesitant to get one. Fortunately my dog isn't a barker, he kind of just looks up when someone's at the door. But you're probably right, rude is rude and if they'll disregard one thing they'll probably just ignore any attempt to fix the issue.
We rarely if ever have to sign for anything, but if we did I wouldn't expect them to change that policy for me. As for how loud they're knocking, our front door is mostly glass and they usually give a really loud Bang Bang Bang, then ring the bell. I know he's just letting anyone who might be home there's a package there, but our house has really high ceiling so anything echoes really loudly.
I might look into a white noise machine. I think I'd actually registered for that lamb, I just never got it when I went and did my completion trip.