If that's code for, "Hey, can you let me jumpseat so I can get a refund on my ticket?", I'd say, Yes, that's poor etiquette.
If it's code for, "Hey, do you think you could persuade the FAs to slip us a few bottles of booze under the table?", same answer.
If it's code for, "Hey, would you mind making a PA that you have a couple of honeymooners on board?", well, that'd be kinda cheesy, but not a breach of etiquette.
If it were me on my honeymoon, I'd be glad I had a ticket so I wouldn't have to worry about the uncertainties of jumpseating. Since "jumpseat" is in your thread title, I'm inclined to think that's what you were hinting. Honeymoon and jumpseating? FORGET ABOUT IT!
Greet everyone you see the way you'd want to be greeted, and enjoy the flight.
Oh, and Congratulations!
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