It only takes a "report X player" from 3 different people to start the afk timer on them. I found this out when I reported a ret pally afk for running past DBN bunker that was tagged by horde with only 1 horde defending it. I ended up mounting up from IBGY and going back to recap it.

PS: Off-topic I know but it annoys me when people ignore recapping bunkers. Especially the bunkers near Vann when the horde O is no where near it.

As fro reporting people AFK, I'm not sure if there is one to report everyone afk as soon as the game starts, but http://wow.curse.com/downloads/wow-a...-reporter.aspx reports people afk after monitoring their stats over a period of time before reporting them afk. You might be able to customise it to report someone afk if they don't do 100k dmg in 5 seconds...and then turn it off after 30 seconds into the match.