I'm really new to this but I think you guys are having trouble understanding one an other. So allow me to try (feel free to correct me if I'm wrong)
OP-
Lets say Noob1 connected to an open AP and saved it. In the same area Noob2 connected to an encrypted AP and saved it. These are the only AP each have saved. Noob1's laptop will try to connect to it's saved unencrypted AP and the FON will say "that's me" but Noob2's laptop wont because the saved network it has is encrypted. Now if Noob3 has both of these AP's it will connect to your fon as if your FON was the unencrypted connection.
Again I"m new to this and I only picked that up off what Mr/ P was saying if I'm wrong please call me out on it.