Bukkit

When a player joins a town or is on the server for a certain amount of time, they should not be able to tour for free, even if they are town-less.

Prevent the player from touring for free when:
  1.  the player has previously joined a town
  2.  the player has been on the server for a configurable amount of time

Constraint #1 can be implemented by saving the player's name in a database when they first join a town. However, it should be removed on the deletion of their Towny data.
Constraint #2 can be implemented by checking the player's join date stored by Towny.