I remember flying from LAX in 2005 with VA. We'd arrived at checkin early so were at the head of the line when the checkin opened. As we were walking out of the area, a VA agent was making everyone in the checkout line weigh their bags before getting to the check in desk and then either passing them to go to check in or to repack their bags to lose weight.
I think that may have been connected with the max bag weight of 32 kg that had been implemented but could be mistaken.... As I recall there were a lot of grumbles from the people waiting in the line...