Sounds like some of you are making us "pour it in the right spot" folks out as Tree Huggers. I am just the contrary....I'd chainsaw a tree right out of the front yard with my neighbors kitty still in it, if I needed some firewood. The point was about what damage the salt can do.
I challenge you...start dumping it into your driveway or sidewalk for 3 months, and report back what you see. Or, dump it in the same spot in your grass for 3 weeks, and let us know. And BTW, if you are on a municipal system, then no, none of this applies to you. Dump it down the drain. City/county waste water systems are so diluted that our little contribution would be like driving a boat out to the gulf stream, peeing off the side of the boat, and then coming back home. I don't think it would kill anyone.