Have you made any progress on this? What follows is not a perfect answer, as I am delving into these settings as well.
From my research (& help from Cisco), it looks like one approach would be to create some rogue AP policies on your WLCs (Security > Wireless Protection Policies > Rogue Policies) to give more relevant alarms.
- You could increase detection minimum RSSI to a level where devices could really communicate
- Rogue Rules - I'm still learning how to do these
Also, in PI > Administration > Settings > Severity Configuration, it may be helpful to adjust the severity of some alarms, which could be useful if you have email alerts configured based on certain severity levels.
Currently, I'm also exploring the rogue notification options under Reports > Report Launch Pad > Security > Rogue APs, New Rogue APs, & Rogue AP Events.