Bridal Gowns for Sale, Bride not included

Having researched pre-loved and used sites for bridal gowns which have been used (mostly) and are now surplus to requirements I am intrigued by the relatively high number of brides who have obscured their identity, by various means. Why would something which was such a significant piece of clothing for these women need to be so clearly dis-associated from them at the point of sale? Has anyone sold a wedding dress and done this? I'd love to get your thoughts/ reasoning for your white out.