Yep. I watch the classifieds and generally keep my public comments on the positive side ...Usually, when I comment on an add for a gun for sale I say it is a nice looking gun, great price, or my favorite comment, "Drool!"
BUT ...
If I see a friend show interest in something from someone Grumpy or I've done a deal with and there was any problems I will send my buddy a PM. Thankfully, in all these years I've only had a couple of deals get sideways.