For posting: - invitations to games (you can also use the New Game menu or go straight to the Chess Invitation) - information about upcoming tournaments - discussion of games (please limit this to completed games or discussion on how a game has arrived at a certain position ... speculation on who has an advantage or the benefits of potential moves is not permitted) - links to interesting related sites (non-promotional)
There is one problem with the "falling" system, and that is regarding multiple win matches. A 10 wins match counts as 1 game, and it could take a very, very long time to complete. If this is the only thing you have going, you could still be active and lose points.
In my own case, a good % of my tournament games end up in 3-wins matches. So many games are not even applied to my rating. I have 15 won tournaments, and most were 3-0 situations, so I have up to 30 games unaccounted for that look like inactivity. That is about 11% of all of my games dropping through the cracks.
What should happen is, after X days of no results for a particular game type, you just don't show on the "active" list. You are still there, no diminished rating, just not visible until you play again.
That way:
1. "Rating mongers" who just win a few games to get an inflated rating fall off the list.
2. Those who disappear due to a temporary leave of absence can re-appear when they start playing.
3. Those coddled into playing who are truly over-rated will rebalance the system by losing points once they become active again.