Current rule reads:

While in the open room lobby all players are expected to be available for playing which includes accepting challenges. If you are going to be AFK or unavailable you must remove yourself from the lobby. Upon your return to the lobby you must announce you have returned and are ready to accept challenges.

Proposed Change:

While in the lobby, players ranked in the Top 20 must be available to play (which includes accepting lobby challenges). Top 20 players may not go AFK or BRB; if you are unavailable to play and/or accept challenges, you must immediately remove yourself from the lobby.