I think it's adorable lol. I've been to a pirate wedding but the two people getting 'married' were actually dating in real life and had been in a relationship for a year or so, and they were in their late teens i think. But when it's little kids it's very strange, but very cute
just let them have their fun i say. In another online game i play there is an option you can click to 'roleplay' in which you create a background for your character, a personality etc and act according to it, so some people just prefer playing along. The younger kids might take it seriously, i get a lot of requests to be wedded and be their gf when i've said about two words to them, but hey that's just kids it's what they are like at that age i guess lol.
P.S. Tormenta Tag? Just hearing the title makes it seem so much fun!