Many small advantages sums up... Looms , macros , custom textures, and gfx settings.
Some of these are more valuable than say an autoblocker(bannable), but since its hard to test for, and its a game, relative litte harm done, let people have their fun.Shady, but not cheating.
One simple use of macros not yet mentioned, that would be very usefull to an archer, is a macro for releasing the arrow with perfect timing, maxing holddamage every shot made. 0.50 sec hold before release.
Same with meleeweapons but that is trickier, since people block and move.