I've said it before and I'll say it again. Write letters. Actual, physical letters, on sheets of paper, that get sent through the postal service. If you care enough to write a real letter, and pay for it to be sent you increase the chance of someone at S&W(or anywhere) caring enough to read it. Nobody gives two craps about complaint emails from someone they've ever heard of.
Part 2: Stop buying from S&W. Buy from their competitors. Don't even buy old S&W, as it demonstrates you're still in there pocket and will come around soon or later. If you're buying current models, why should they change? They're getting your money anyway. Make a point of this in your letter(s). I makes more of an impression when they're not only losing money, but that money is going to someone else.
And of course, one person's letter doesn't mean whole lot. You need a bunch of em, so organizing is key.
Granted, locks seem to be showing up on everybodies revolvers, so you might need to act really quickly. Good luck.