First of all, it's really weird to swipe a word that means "no school" and use it in that way. But then to encourage parents to think up projects for their kids to do in summertime, rather than let them actually be FREE for a few months from all the manipulations of "education", well it's the anti-thesis of unschooling in every way.
Use a different term. PLEASE. How confusing for people who really want to learn about getting away from the school system and trusting their child's natural learning process.
***Addendum: My comments are not being deleted, there is some other reason they are not going through. Must be a technical glitch.