I don't know how you can ever regulate chain saws, trees will continue to grow and the market is awash with cheap chainsaws. I remember when I bought my Stihl Farm Boss back in 1983 it cost me $800, so it was a machine that the average punter would not go out and buy to just cut off a few branches. They have to up the top of the pile with being a dangerous machines and because there is plenty of lightweight units out there the temptation to climb a tree to cut a few branches off seems too easy. I use a bow saw for most in tree work
