This HAS to be about OWL.
The nice thing about it is that it's a real problem. People's problems with OWL and such are most often irrational, such as people who pointlessly worry that the parents have no idea what's going on in the sex or drug education classes. (The churches that teach OWL seem to do tons of meetings with OWL parents and such. They are absolutely as informed as they care to be.)
I am certain that this boundary issues problem exists if only because my own church is so very careful to look for it. Both my application to be a YRUU leader and in my recent "how's it going" interview had questions about how active I was in the church outside of YRUU (fellowship dinner aside, not as much as I should be, but YRUU is a huge time suck) and how many friends I had outside the church (more than I have time to visit or hang out with.) This was all to make sure the high school kids weren't my only friends, which presumably leads to poor leadership and confiding weird stuff in the kids.
I was a little bit insulted by the question, (Adults who befriend mostly high school kids are not reasonable people. I should know, I dated several of them when I was a high school kid myself,) but it wasn't unreasonable to have been asked. I passed, of course, if anything, I don't feel bonded enough to the YRUUers because I haven't given it the time commitment I should. But suffice to say, these boundaries are an important thing to the people administering YRUU in my church and something every church should keep in mind.