My parents got in when I was about 12 or 13 - (studied, but joined for sure when I was 14)...
And I can honestly tell you that I was so ashamed of it that I absolutely avoided telling anybody else in high school what church we were going to.
For a long time after I walked out, I was also ashamed to admit to anybody that I had ever been in it.
Now I view it as a big lesson in life, and a chance to help other people involved in control cults get themselves free and clear.