This process of opinion drift isn't a mystery, forums tend to follow the ideologies of the most dominant posters and what management allows, then the "follower" posters go along with it and anyone else just ignores the topics they feel are hot potatoes and post on things that interest them.
Maybe people change their minds on issues over time as they experience more of life and information, maybe they always were "right" or "left" leaning but didn't feel comfortable being open about it - hey, it happens in groups, people become afraid to voice a dissenting opinion for fear of upsetting the group.
But tides change and worms turn, shifting sands could be seen as a good thing it means the opinion is not "settled" and things could "change" again.
Is it supposed to be politically neutral here? (Not being smart just asking.)