It might be an idea to have a checkbox list somewhere, that way you can lock / unlock various things from this list from being accidentally selected when editing.
[] Lock lights
[] Lock Trigger Zones
[] Lock AI Characters
[] Lock Static Entities
[] Lock Dynamic Entities
[] Lock Decals
Check out my YouTube Gaming Channel: /user/MadLadDesigns
W7 Home 64-bit, Intel i5-3330 quad-core 3.20GHz, nVidia GTX660 2Gb, 8Gb ram