Take your orphan into the battlegrounds and complete the feats listed below.
Worst. Achievement. Ever. The PvP-oriented players want to kill other players (PvP and all that) while the PvE-oriented players are just there to attempt the achievement. Even worse, the PvE-ers are competing against each other for the achievement criteria, too. Be prepared to /weep in Real Life. Your best chance is to create a pre-formed group that agrees to a specified order for players - and then buy all the Rabbit's Foot (maybe even Rabbit's Other Foot ) you can purchase from the Auction House. I also recommend gnome sacrifice (or blood elf if you're Alliance).
Do not bother to complain on the official forums. Blizzard has yet to budge despite the several years of wailing and gnashing of teeth from both PvP-ers and PvE-ers.
It's extremely hard to find something that is universally loathed by players, which says a lot about this achievement.
Alliance also sacrifice their gnomes. That is not a Horde thing. No one likes gnomes. Besides hatred for Hard Knocks, it is the other thing that unites us.