I know what you want to do, but some people chose places that people frequent to set up bazaars and that would ruin some of the shopping options I have when I'm shopping. Also colour zones on the ground would look tacky.

Though it would be nice to be able to not have to wade through idlers at times. There is a command in options to reduce the number of players loaded at one time, but I find that it causes problems when set too low during large party situations and I hate having to readjust game settings based on what I'm doing. Also hiding people with bazaars open is equally irritating when shopping.

I think it would be nice to have anyone determined to be idle at congestion areas to be pushed back after a time, much shorter than max timeout (Maybe 10 minutes). Give Abyssean NPCs a knockback effect that triggers on targets after 10-15 minutes of idling in front of them. Give Cavernous Maws and Mog Houses a draw-in effect for the same time limit.

The way I see it, the knockback would clear the walking path, and the draw in will solve the mog house entry/exit dilemma as well.