Look what happened to Mt. Everest: http://edition.cnn.com/2015/04/02/travel/feat-mount-everest-... -- there's no "small enough" or "difficult enough to scale" (or "protected") when it comes to tourism.

I grew up five minutes away from the escarpment, near Guelph. I used to climb those cliffs as a kid. For the most part, respectful use is encouraged. Not a lot has changed since I was a kid with respect to these cliffs or the nature in and around them so I guess that is good. If you are curious what is being done, check this out: http://www.greenbelt.ca/