controlling wireless connections

[Gene Czarcinski <gczarcinski gmail com>]

I recently moved into a new development and pretty much each and every 
home in this development has a WIFI network.  While most of these 
network are secure a few of them are not but require some kind of 
handshake to establish "guest" access.  These "guest access" WIFI 
networks are a pain because my Fedora 18 client systems (running Network 
Manager) will sometimes attempt to use one of these network rather then 
my secure WIFI network.

Is there some way to "blacklist" WIFI network not to be used?  Or, to 
reverse that question, is there some way of specifying that only 
networks with a specific SSID should be used?

If this capability does not currently exist, should it be implemented?

Gene