I guess, as far as rules go they could be something like
Lose a round by (Other than losing, obviously)
- Warping more than 2 times
- Excessively lagging
- Every minute you are late to the match
If you log off, before the match has finished, then you lose double the points for poor sportsmanship.
Activity
- Must do at least 10 matches a month, if you are in top 3 tiers
- Must do at least 5 matches a month, tier 4 and below
- Every match you miss, you drop a certain amount of points
There would be some rules for disputing, but you'd have to record the matches on your own for that.
No idea what else, for now, but if I were to have a website with rankings, I'd put something like that.