OMG, I just read about this new app that THE KIDS are going crazy for. It's called Yik Yak and it's just an anonymous message board that seems to be mostly used by college kids. It's location-based, so you automatically see your school's posts.
I downloaded it and sure enough, it was all college-related posts.
YT, I bet your students will never in a million years guess that you have this app installed. It's probably a great way to get laughs from the dumb things they say.
On the other hand, they might say something mean about you, which could suck.