I propose a solution: Newbie leagues. Here is an outline of proposed changes:
- Newbie leagues are one-off short championships (5-10 races). They don't have tiers and are deleted from the server once they are finished.
- Only complete newbies can join such leagues and cannot join normal leagues yet.
- After a newbie finishes a newbie league, he doesn't have an active league and must actively join a normal one. This way, if he just abandons the game as most, he will not continue spoiling it for others.
- Non-newbies cannot join newbie leagues.
There are some quirks, e.g. it's not obvious what to do with less-than-a-year of driver training etc. But I'm sure these a minor things and whatever workaround is taken, it will be much better than having the game flooded with inactive players.