It used to be that if it were a world cruise advertised voyage then there would be one roll call for that particular cruise. Often times the lines will also break those it into segments as well. So each segment had its own roll call.
What happens now though is that someone will try to merge each segment into one big roll call. That's okay if you are going to be voyaging on all segments, but it is a little much if you are booked on only one. For instance, on a number of occasions we were on one roll call then someone created a "spread sheet" and decided to merge a number of segments. Not the site moderator, mind you, but just someone on the board acting alone. So, okay, the segment roll calls don't go away but when a newcomer posts on a particular segment, others immediately post explaining that he/she should be on the merged roll call, like they did something wrong listing themselves on the segment and only segment they were sailing on.
Then you combine that with 80% to 90% of the posts deal only with chit-chat between those attempting to circumvent the line's shore excursion packages in order to get better deals, you get what I consider a mess, very irritating.
One time we booked Buenos Aires to Miami via up and down the Amazon and some eastern Caribbean, shortly after getting on the roll call someone merged it into one with three or four additional segments, which brought in a circumnavigation of South America and Western North America. I objected, and received a couple of nasty responses insinuating that I was selfish or something. Fortunately, the cruise line came up with a Miami to Miami Amazon adventure on another ship which was not only cheaper, but longer and we got a larger stateroom plus we didn't have to fly to Argentina. I immediately got on the new roll call and off the other.
Much later, I looked back at the multi-segment roll call and noticed that after we had canceled a lady posted that she was thankful "Kennicott" wasn't going to be on the ship with her. Haw, that made two of us.