All the ways we interact with others can be considered a social skill, I feel. That doesn't mean all of our acquired "skills" are desirable ones, by any stretch of the imagination.
Every exchange we have, be it in thought or actually expressed outwardly, releases an energetic cord in the direction of our intent. The more other folks feed into it, the more speed it gains as it keeps growing along. The snowball effect can kick in at any given moment and then you end up with an avalanche. It's up to us if we wish to keep releasing certain cords and fueling all of those energies that will eventually come back to choke us out of our own perceived comfort zones.
I worked in a place of much manipulation and backstabbing and saw first hand how the gossip scene could easily devastate lives and create a highly toxic atmosphere to try to function in. It was in a direct care arena where you'd certainly hope for much more stability among the folks making decisions that will forever effect the lives of others, but it seems to be human nature, unfortunately. It was often disguised as simply being a way to get ahead in the workplace by the administrative staff, so eventually, at some point or another, everyone participated at some level in hopes of keeping their positions or advancing for more money.
I've long since learned, mostly through repeatedly feeling those feelings in the pit of my gut when I know I'm about to engage in a behavior that could potentially cause harm/discord to myself or another, that if I'm going to talk about someone when they aren't present, I try to make it something that raises the vibrations of the moment (and hopefully the spirits of whoever the "gossip" will get back to) rather than lowering them as I was so used to in my former life, be it in the workplace or the typical social scenes I used to frequent.
There's enough other hateful/unfortunate/tragic shit in life that gnaws at us and takes us down and out, sometimes slowly but very surely, and I don't ever again wish to be conducting the kind of energy who thrives on taking other beings of any kind down and out.