After 1 minute of champion inactivity at beginning of a dom match, send everyone back to q. Perhaps a one day instaban or q deny for the afker ?

A 1 minute period would give time for a dc/reconnect.

Oh no, my baby fell and started bleeding. I should just ignore him so I don't get insta banned!

Life happens sometimes. I understand playing 4v5 is no fun, but why punish someone over something they may not have any control over? What if there power goes out for some odd reason? Instaban!

Or just play the game and report them AFK if it bugs you?

4v5 might not be pleasant, or fair, but if you treat it seriously you'll learn how to deal with fights in Dom where, even with no DCs, you're out-numbered. Sometimes you have to 3v4 or 4v5 on a point in order to let another part of the map be assaulted at key times by your team.

Not to mention the Tribunal and Leavebuster are designed to already take care of this problem by punishing the people who do this chronically; while not penalizing those who have reasons beyond their control for not being able to be at the keys that very moment. An additional penalty system isn't required. Even the High ELO players of both SR and Dom have to deal with AFKs; didn't stop them from rising through the ranks. ^_~

And for an addition to that; 1 minute isn't really 'sufficient' IMO. My last game this morning featured an Olaf that went AFK by accident for the first 3-4 minutes of the game (counting from after the starting barrier drops). He came back and we won despite the 4v5 costing early Windmill and nearly losing us mid.

Also...it's highly exploitable. Undesirable enemy team comp? Fake d/c, everybody goes back to queue. Yes, it would happen. Why give those who would a reason?