What if they couldn't afford a honeymoon and this is it, 18 months later? There is no "right" way to celebrate a marriage. My husband left only weeks of us getting married to move across country for his PhD. When he returns we may do a vow renewal or go on a second honeymoon. It will feel like we're "just married" even though we'll have been married for two years because we won't have been together for that time. If we were to return to Disney you can bet your buttons I woud be celebrating!
I wouldn't judge anyone on how or what they choose to celebrate. If you're getting married for the "spot light" you're definitely doing it for the wrong reasons. Other people celebrating won't diminish your celebration, so don't worry about it!