Having never been a part of a private game (that I know of), here are my two cents. I'm personally neutral on the issue.
I'm not so sure that removing private games will solve all of the things you want to solve. It may just cause GMs more effort to achieve the same goals.
Originally Posted by Plugsy
A significant problem with private games is the restriction it paces on the ability of GMs to check out players existing games and vice versa for players checking GMs. Among the most effective actions which can be taken to avoid failed games is checking out a member's existing games and the growth in the unintended use of private status increases game failure rates.
Another problem is that games are joint property formed by the collaboration of players and GM, if a player is removed from the game he/she no longer has access to what is his/her joint intellectual property.
If a GM or player is so concerned about their privacy, as private threads and posts will still remain, users may make all threads private to a subset of users, or, if they're really so dedicated, make all posts private. I can't see anyone going to the pains of the latter but the former also prevents user-history from being solved effectively. Users still will be hard-pressed to find a player's posting/gaming history if the player is inclined to private threads.
In addition, if a GM regulates private threads based on current players, players who have left are still denied access to their joint intellectual property, correct? They can still see portions of their old posts, but I believe that is true in the status quo as well.
However, I confess that my understanding of private games is not complete. Does an archived private game become as visible as an archived normal game with 100% private threads? What about an archived normal game with 100% private posts? My understanding is that they behave similarly (no visibility/access post-archival) but if this is false then the above points are less concerning, though they still apply to games in-progress.