I think we need to develop a way to test if you are currently high right now and we need regulation on strength of product. Once there, I don't think this will be worse than alcohol, but who knows. I think there is simply a lot of stuff we don't know about long term use that isn't anecdotal.
With out the above, it's definitely not a great thing. As someone who is in and out of a lot of commercial and industrial properties daily, pretty much everyone immediately smells of weed these days, when I initially enter the property. That definitely isn't good.