Parents & 18-Year-Olds & Lawyers - Power Of Attorney Before College

Source request for Slate Magazine: I'm writing an article about parents seeking power of attorney over their 18 year old kids before they go off to college and I'm looking to speak with 1. people who've been forced to sign these documents by their parents 2. parents who've asked their kids to sign these 3. lawyers who've encountered these and/or can speak to their utility (or lack there of) THANK YOU.