New one at SGN last week. The opposite happened, someone not ready queue jumped people who were. The area for the tray loading is very short, about the length of a standard desk. 2-3 people max at one time. I patiently waited for space to load the tray (everything in my hand ready to, go except my shoes, which have to be removed ), and old mate (European I think, heard him talking to someone after security, I won't point out the nationality) walks straight up the to x ray machine and plonks an empty tray on the rollers and proceeds to unpack his laptop, belt, wallet, watch etc. Blocking the rest of us who had been waiting patiently and were ready to go. Been travelling long enough to not let it worry me, but can always pick a w#@$ker when I see one.