I think you should be able to create passwords for warps. You create a password in the mayor+ application. Many people have reasons for this. This is how it should look like: Do you want a password for your town/nation warp? If yes, what is it? Yes. 1a2b3c This should be a PM on forums sent by a staff member replying to the application. Only passwords can be added to towns or nation warps. I like my Mail Update suggestion (below this suggestion) more than this one.
What kind of reasons exactly, do you have any examples? I can't think of any times that I have wanted a password for a town, and I can't think of any reasons why anyone else would want one, so I do not see the point of having this. Also, what would happen if, for example, someone got the password for your town who wasn't supposed to and you needed to change the password? Would there be another application that would have to be filed? It just seems to be more complicated than it is worth. If you really want to have a password for your town then you can just put your warp in a building and have a password locked door in order to leave and enter the town.