XI's system required booking because they used a live GM to perform the service. I think it was too complicated a process, although having the live GM was something rather special. I sort of hope there is some sort of barrier that keeps just anyone from marrying for laughs or for the in game goodies. Something that helps filter out players that actually want to go through the process as a symbol of devotion to their partner rather than someone whom wants to marry off two mules to get a free mount.