This is an example of poor judgement and it is not limited to LDS scout troops. If the rock was going to fall they should have put up warning signs and notified whoever was in charge. Just look at our government, four wheelers tearing up the landscape and not following the rules, greens using bugs and birds to close off large areas of land to everyone except hikers. All examples of poor judgement.
I have been in just about every scouting position there is over the last 45 years. This includes 20 years not LDS and 25 years with LDS. When any scout troop does something stupid it becomes hot news because they are supposed to know better and if they are LDS this is multiplied 10 times. I have read too many headlines about Scout starts forest fire, Scout lost in mountains, Scout eaten by cougar etc. Thank God that I have also read Scout saves drowning girl, Scout saves family from house fire, Scout gives CPR and saves mans life, etc.
I think the scout leaders on a whole are better in non LDS troops. The main reason being that they want to be there and are not chosen to be there. That said the best scout leaders I have ever known were LDS that wanted to be there after they were chosen.
Where money is concerned I believe the professional scout leaders are overpaid but most of them are knowledgeable and dedicated. LDS troops make up 40% of membership and furnish 60% of the money.
To me the greatest thing scouting does for boys is it gives them examples of life away from the city and opens the door to so many life choices with the merit badge program. As has already been mentioned it also gives them the opportunity to learn how to lead. You may remember that the first 5 or 7 astronauts were Eagle scouts and the Marine corps gives an automatic rank upgrade to recruits out of boot camp.
Do not hold all scouts and scouters responsible for what some do just as we four wheelers should not be held responsible for what some do.