I too have skied alone a lot over the past 20 years - both on piste and BC. My wife is always relieved when I go skiing with someone else. While I enjoy the solitude, I also have tried to respect my responsibility as my families provider. As a general rule when alone I ski more trafficked areas and generally avoid tree skiing (tight trees) as I fell into a tree well as a teenager and fortunately had friends with me who got me out. It was pretty scary and not something I ever want to experience again. As far as safety equipment goes, it makes perfect sense to me to take advantage of the innovation and advancement of safety equipment, just as we do with ski clothing and other accessories. Heck - 30 years ago, we didn't have the opportunity for this type of discussion - across the world - because this technology didn't exist!
In regards to 'pdiddy's" post above (haven't quite figured out the "quote" ) ... regarding the danger of swimming/surfing in ocean alone, as a body boarder and SUP (Stand Up Paddle Boarder) I have been tossed around the ocean floor many times and while not fun - it is part of the risk we take to engage in the pursuit of what we love. I did see that drowning is the SIXTH leading cause of unintentional death in the USA (http://www.cdc.gov/homeandrecreationalsafety/water-safety/waterinjuries-factsheet.html). At the end of the day, I still stand a greater risk of dying in car wreck ... than on the mountain or in the ocean. I'll take those odds, and seek to be respectful of my capabilities and of others.