I stumbled upon this and think it makes some pretty valid points!

http://www.naturephotographers.net/codeofconduct.html

I think I saw it on an IL DNR sign: "Take only pictures, leave only footprints."

Very good points gretch.....Alot of people forget about the animal and just want a "good shot!"

I was always taught take only memories , leave only footprints but pictures work too.....lol