Which free server is worth to multibox on?

Yep - I am crying - 3 lvl 70 teams: 5 druids, 1 shammy 4 locks, 1 shammy 4 hunters. Goodbye. Just would have gotten them into 80! Out of money. Crying. Need to play on public server.

Which free wow server is worth to multibox on. Is any wow like servers on which cheating is not abuse?