Yeah, that whole 18-yo thing has been evolving over time. But today, I know of no colleges that take on ILP, although Pepperdine has (or used to have) a requirement that Freshmen live on campus or at the parent's home. Pepperdine also has no alcohol and other very restrictive rules.
(ps: I worked for a University for nearly 15 years up until a few years ago).
There are plenty of religious colleges that do.