Thanks Lindsey 
Our community is a very heavy user of photographs, with over half a million images on our Discourse now.
One of the problems we face with auto-grid being automatically applied is that 99% of our users don’t know what it is, that it is being applied, nor how to remove it.
Why might this be an issue?
~96% of the photos our community shares are landscape in orientation, not portrait.
Auto-gridding crops the images a user uploads rather dramatically, chopping the edges off and turning landscape photos in to portrait photos to the naked eye 
One community member even accused us of modifying their photos.
There is perhaps some irony in my landscape screen shots that I just uploaded now not being landscape 
Our fear is that we are just several days in to this new feature, I can’t imagine what the coming weeks and months will be like 