They did not lynch those two herders.

They did not kill them, either by bullets, knives, or beating to death.

They took away the guns, however, and they told them with extreme bluntness what sort of men they believed them to be.

They defined accurately their position in society at large, in that neighborhood, and stated what would be their future fate if they persisted in acting with so little caution and common sense.
At Andy Green's earnest behest they also wound them round and round with ropes, before they departed, and gave them some very good advice upon the matter of range rules and the herding of sheep, particularly of Dot sheep.
"You're playing big luck, if you only had sense enough to know it," Andy pointed out to the recumbent three before they rode away.

"We didn't come over here on the warpath, and, if you hadn't got in such a darned hurry to start something, you'd be a whole lot more comfortable right now.