My home course has tees from shortest to longest as red (5300?) white (5900) gold (6600) black (7000+) I still see very inexperienced players often playing from the golds. I don't think it has to do with any desire to play from white tees, just that a lot of people know enough to know they shouldn't play from the tips, so they move up one set from the back.
On courses with five sets, I usually see most people playing from the middle tees, so maybe it is a "I want to play from the middle, but decide ties in favor of moving back"
Were it up to me, I'd put up a sign on my home course that says something like this:
red: recommended for women, juniors, beginners, seniors
white: recommended for experienced women, experienced juniors, occasional golfers, experienced seniors
gold: recommended for experienced, regular golfers only
black: recommended for very skilled golfers only
What you want to do is tilt the beginners and occasional players toward more forward tees. People who play frequently (of any age or sex) can make the judgement for themselves. Maybe not always correctly, but changing or eliminating colors, posting notices on the card, etc. aren't going to change that. Shivas' friend who hits it only 230 knows that his 5 isn't the same as my 5 in terms of whether to play the tips, but he should have the right to play there if he wants to work on his fairway woods and short game.
If you eliminate color coding from the teeboxes, then it means half the groups will be walking up on multiple teeboxes to squat down and check out the symbol on the teemarkers to see if it is a deer or an oak or a squirrel or whatever. Or if you use tee markers that look like a duck or a squirrel to avoid that problem people will steal them to put in their garden at home.