I was in a meeting where this just happened. And as liberal as I am, it is exactly PC nitpicking. You can also choose to lead by example rather than correcting people. Despite all the good intentions in the world, people may not react well to this style, making your contribution locally ineffective.
This is double if the person you're correcting doesn't think what they're doing is "wrong".
Some of my biggest stressors in the past came from trying to change people or believing that I was entitled to have people act and react the way I wanted them too.
I don't give that privilege to others and I don't expect anybody else to.
I say guys because my developers and analysts and quality managers are all men. The only women I work with are two secretaries, and they're not even in my department.
What's too bad, friend, is that you have deluded yourself into believing you have the right of way over another person, for any reason whatsoever.