A friend of mine is extremely involved with a yeshiva that does not require the bochurim to wear white shirts. A friend of hers with a daughter asked about a particular bochur. She asked if he wears only white shirts. My friend replied that she wouldn’t answer the question as it wasn’t relevant. The woman asked her, “but if he doesn’t wear white shirts, how do I know he’s frum?”
I guess learning in a yeshiva is not good enough.