This functionality exists, and is wholley unnecessary. The devs turn this feature on at the start of an expansion when the influx of players is at its highest and worlds are constantly full, any other time it is not needed.

You will get comments like "get better internet" because this is not an issue with the AFK people, this is an issue between your system and SEs system. Blips happen on both ends, and kicking afk people will do nothing to stop your problem, because the two are unrelated.