Suggested spells to ban.

List of spells to be disabled:
BanishRain- Stops rain server wild
CreateWater- Creates water source blocks at target location.
Daylight- Automatically ends night server wide.
Dig- just bad!
DivineIntervention- From any other world, warps you to the main world at a 1/8 ratio.  If you end up in the building of a claimed plot, and air pocket is created, deleting the blocks it converts.
Drought- can be used to oblierate all water and turn dirt to sand.  It may not follow the rules of towny just like dig.
EnderIntervention- Reverse of DivineIntervention.  Can be used to grief the same way.
Mark- Used for the recall spell.
Recall- Free warping/teleporting.
Moonrise- Turns the server time to night.
WizardsAutumn- Used to stip leaves from trees.  Can be abused like dig.