BioWare isn't the only organization to use word filters on its forums. But its justification for banning words that describe homosexuality might be the least convincing.
The forum's word filter blanks out 'gay'; likely because it's so often used by morons to describe something in a derogatory fashion; usually with no obvious connection to sexuality. Other words such as 'lesbian' are also blanked.
BioWare moderator Sean Dahlberg explains, "As I have stated before, these are terms that do not exist in Star Wars." But, surely, the real reason is a forlorn attempt - no doubt with the best intentions - to cleanse the forums of derogatory use of these words.