They would often sew down their pockets for a more crisp, and clean look on their uniform. I'm not gonna claim to have done any work in ABUs or BDUs, other than airsofting and wearing them for uniform days. Personally, since my school has the ACUs and I've worn both the ABU and ACU for inspection, I have found that the ABU is much more comfortable to wear around, my only complaint being that it heats up quickly. This is all about personal preference in my opinion, and isn't relevant to the discussion so i'm just gonna leave it with my opinion and forget about it.
Now with regards to your comment about my non-existent impression, I believe I said, "If you squint while looking at it I am a USAF Security Forces guy.Otherwise, i'm not trying to be much." Merely stating that it COULD possibly be an AF SF guy, but i'm not necessarily attempting to do an impression of that. Don't take my words out of context.