I should introduce myself by saying I used to referee at junior level about 20 years ago, haven't done so since, but try to keep on top of the Laws.
The issue of quick free kicks is one that interests me, because I've always been pretty clear that a defending player moving to within ten yards of the ball once the free kick has been awarded ("Stand on it!") is a complete no-no, but from experience as a spectator it seems to be pretty much accepted practice throughout the pyramid.
The impression I get from the posts here is that my original view is still valid, which begs the question why we don't see more enforcement? For me it's one of those where if a player knew they'd be going in the book as soon as they moved towards the ball (and the ref's 'superiors' would support that), it would stop pretty quickly.