that would be pref bloat, and inexperienced computer users (read: children 8-12 y/o and computer-illiterate adults) wouldn't know to check the options/where to look in options to find a way to disable this
look at things from the "bob is an english major and has no clue how they work past folders and double-clicking .exe's" perspective. understand that your experience with coding and computers is clouding your ability to see things as if you didn't know how they work.
Then they could always report the player with bad decals to the server admins and have them handle it.