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Hiding SSIDs is a bad idea because it increases support needs. WLAN client software (especially Windows Wireless Zero Configuration) sometimes will not connect to a hidden SSID if another Preferred Network with a non-hidden SSID is nearby.

For klulue and rfinley, only bad things can come from disabling the SSID. If you have to support the networks you install, then you are opening yourself up to needless support calls while providing minimal (at best) additional security. If you don't support the networks you install, then you may end up with ticked off clients because their end users can't connect.