What is your opinion on the man-made stuff you come across in Quetico?  I'm not talking about portages and fire pits - they are somewhat necessary.  I'm talking about all the rock formations, cairns, inuk's, log furniture, tables, cooking grates, etc... that are becoming more prevalent IMO.  Should we tear them down?  Pack them out?  Dismantle them? 

I usually tear down the rock structures and toss log furniture into the woods.  Tables with nails are usually left and reported to park officials.  What are your thoughts?