We wore them around WDW after our Disney Wedding. We got varied reactions. For the most part the cast members went out of their way to congratulate us and offer best wishes. There were a couple of cases where the CMs looked at us, looked at the buttons, and decided to not say anything. You could see the look on their faces: "Are they together or are their wives in the bathroom . . . better not chance it".
Most of the time they'd ask "oh, who got married" and then they'd offer hearty congratulations.
The CMs on the Disney Cruise were really good about the just married buttons, too. Perhaps a bit better than the ones at WDW.
Call and have them note that you're on your honeymoon in the notes on your DCL reservation.
We did, and we found the cruise line "We're on our Honeymoon" buttons on the bed when we got to our cabin. So we've got both the WDW and the DCL buttons.
We also got a honeymoon pin from the shipboard store after I had a conversation about our Disney Wedding with the young lady working the register.
HOW did we miss you last Aug?? Anywhoo, we'll be there again in 68 days, hope to bump into you.
OP, we are also DISNEYMOONING and plan to wear our JUST MARRIED pins. I made sure when I made ALL my ressies, I told them my partner & I are getting married.