I love outdoor climbing and want everyone to enjoy it, including future generations. I also love puppies and want to play with them. The trick is not to get people to agree with me but make those things happen.
Leave No Trace is one of the most popular programs for promoting sustainable enjoyment of the outdoors. However, that is an impossible standard (by name alone). If you climb outside, you will leave a trace. The traces range from short-term, footprints, to long-term, bolts. Instead, I choose to support Tread Lightly. That is a reasonable standard I can do (most of the time).
The difference between Leave No Trace and Tread Lightly is similar to the difference between New Years Resolutions (untenable after a week) and Fresh Starts & Modest Changes (which works now and in the future).