there are some leavers who leave the game jus cz they have bad score n so they ruin the game...i think that u should assing a moderator to check ban avoiding with multy acc....
for ex look this game
http://lagabuse.com/stats/game/4520105/ar-eu-1550-no-tr-1-113:23 (All)vydle killed j4rm3nk311
13:25 (All)j4rm3nk311 has left the game voluntarily, j4rm3nk311 was autobanned.
13:25 (All)Autoban is ON, if you leave you will get autobanned.
14:30 danijemozda (All)ban its good lost game isnt
15:53 danijemozda (Allies)leave before 15 min and its draw game
16:01 EL_Matador (Allies)to get banned
16:02 danijemozda (Allies)we wil def lose this
16:03 EL_Matador (Allies)no ty
16:07 danijemozda (Allies)fuck bun i will leave then
16:09 danijemozda (Allies)if u dont want
16:12 EL_Matador (Allies)ok
16:14 EL_Matador (Allies)leave
16:16 (All)danijemozda has left the game voluntarily, danijemozda was autobanned.
16:16 (All)This game won't affect your ladder stats, game result will be a draw.
so he left n was draw...but the leave the game so easily...maybe they have other acc