I've got an allergy to too much distressing and fading, but it doesn't have anything to do with age appropriateness (I'm 48). I have the allergy for a variety of reasons:
1. When you are petite the distressing has to be in the right place, or it looks goofy. A hole or fading at the knee looks odd if it's below my knee, ya know? Likewise I appreciate the slimming effect strategic fading can provide but if it's hitting my 5'0 body in the wrong places, it just looks bizarre, not flattering.
2. When my kids were in high school, I stayed away from this because I wanted to look like mom, not mom trying to look "cool" and wear their clothes. Now that they are in college, it's different. I feel more freedom to adopt boyfriend jeans, which I have.
3. When I first met my DH in 2002, it was the height of the faded rear end trend. Everyone was wearing jeans with extreme buttock fading. My DH hated this look and often called it "baboon butt." I can't get that out of my head!
4. In the 90s acid wash jeans were all the rage. I tried them, I wore them. I look back at the photos and think I looked ridiculous. I was young then. I'm not knocking it on others - obviously I thought it was a cool look so I gave it a whirl-- it just looks ridiculous on me, at any age.
5. Similarly, I've got it on my emotional map to associate light blue denim with 7th grade. That year the trend turned away from disco bell bottom high waisted light wash jeans and suddenly only dark wash boot cuts were cool. But I hadn't grown an inch since 6th grade, and my mom refused to by me any new jeans. I was horrified, having to wear terribly untrendy jeans as I entered junior high! I wound up taking out the scissors and narrowing all my disco jeans. My mom was impressed with my efforts so she finally agreed to buy me ONE pair of dark wash GAP boot cuts. Which I then wore Every. Single. Day.
So, yeah.