On a bunch of lakes I like to see a bit of a winter kill because just enough knuckleheads will be led to believe that half a dozen dead fish means that the entire lake was killed off. To borrow a line from a great philosopher by the name of Obi-Wan Kenobi: "Who's the more foolish? The fool or the fool who follows him?" People buy into the gloom and doom spread forth by the knuckleheads and they'll avoid that lake for a few years. I do absolutely nothing, zilch, nada, zero to convince them of anything different.
A good winter kill isn't a bad thing...especially on spring fed lakes. If you know where those springs are you can do pretty darn well during harsh winters when minnows are dying away from the springs. Fish close to them and your minnows will be fine and the stuff you are targeting will be stacked up big time. You just have to be aware of ice conditions. The same sort of approach applies during hot summers when water temps shoot way up. Get over the springs and you'll find cooler water. Find cooler water and you'll eliminate a bunch of dead water by focusing on good water.