I feel like people used to do this a lot, or sit 5 people in the bottom lane tribush, or similar. No one would expect a reasonable team to all sit in a bush for first blood, so it can work if they have CC and ignite.Just got forced to play an aram like game in draft.
Walk up to top lane. Minions come. 5 man ganked from the lane bush.
Was not enjoyable. Really shitty thing to do in a draft game. All I wanted to do was play SR.
I don't think the intent is for it to be enjoyable for the other team though -- draft is presumably for people who want to be more serious than blind pick, but not as serious as ranked.