Actually, I'd be in favour of introducing a "falling rating" system, not necessarily instead of the existing system but maybe as an addition to it. It would work like this. Existing BKR would calculated just like now from the outcome of games. However, additionally an amount would be DEDUCTED regularly from ALL BKRs. This could be a percentage like 0.3% per week.

This would mean that you have to keep playing and keep winning in order to keep a high rating. If you don't keep playing then people pass you and your 2700 rating will fall to 2300 over the course of year and down to 2000 over two years.

This is like negative interest in a bank account! The interest rate could be adjusted of course - 0.3%/week is only a suggestion - and the time it's applied could be daily instead (by a smaller amount). But the principle is still there that you couldn't rest on your laurels once you got to the top.

What does everyone think?