I was thinking in this new feature, with which you can see who's online also its level, the class and map name where he/she is at the moment, it could be at the website and only registered players will see this feature. This could help some people who need something in-game as party, trade, help. I also was thinking in a Guild Info menu which let the people know who are the guild members, gthe number of the members, etc...
Sorry for the spam of the idea. I don't think it would be a privacy risk because it could support such as a meet-tool, also can serve to interact because some players do not visit the forum often...