Is there any way to make auto-propagation not affecting Approved segment?

Hi, 

Dealing with ICE from WS is quite challenging. Most of the time we're not allowed to touch ICE. (approved segment in Trados)

However, sometimes we made changes to these segments unknowingly by Auto-Propagation

So I've used Advanced Display Filter to hide "Reviewed segment", and used to think that the auto probation will affect to only 'displayed segment'. No it's not. It affects even those hidden segments. 

I've been thinking of 3 other ways:

1. Turn off auto-propagation for confirmed segment (but actually I want to turn it off only for reviewed segment)

2. Using auto-propagation but not clicking 'yes to all' (which would be very slow for me as I have to handle hundreds or thousands of segments). Confirming them one by one would take too much time.

3. Locked all ICE (Reviewed segment). Then work as normal, and Unlock those Reviewed segments when done. 

I want to use Method 3, but not sure if this would have some effects on ICE status on WorldServer.

Or should any of you have some other ideas, please kindly suggest. Thank you so much.

Jo+