I think I've only used it in jest with friends. I feel kind of guilty about using it, unless it's directed at @VeloClone or @BCClone because those two actually deserve it (and I know they won't be offended by it).
I suppose that I do "JLH" bomb threads when I find that somebody posts too many comments that I find to be a bit ridiculous. I also suppose that isn't really all that respectful.