I'm new to caching, and haven't attended any CITO events yet.
For me, this is just an extension of what I did BEFORE I started caching. I love hiking, and I hate seeing plastic bottles, cigarette butts (and me a smoker!), cans of any kind, and, once at Starved Rock, even a dirty diaper, on or off the trails. It's nice that it has a name, and that they promote it as something positive, but as a previous poster said, Some people will, and some won't. Personal choice, and I won't yell at someone who doesn't unless they are with me and leaving trash. Can't win 'em all, just do what works for YOU.