I´ve a WCSC with 3 controllers and dozens of AP configured. Since this enviroment was installed there are many warnings about Rogue AP.
For example:
Rogue AP '5c:33:8e:df:48:9d' with SSID 'Orange-151c' and channel number '9' is detected by AP 'ALO-R4-P4-AP42' Radio type '802.11b' with RSSI '-89' and SNR '6'.
http://www.cisco.com/en/US/docs/wireless/mse/3350/5.2/wIPS/configuration/guide/msecg_appB_wIPS.html