There are people that think that if you keep your circle sterile, it’ll be for the better, “Negative people only bring negativity”, and that motto actually scales to their whole lives. I don’t 100% agree that it is a great strategy, it is stupid to lose such contacts, if the person in question is valuable. I would say that every lost contact is a loss. Everything else doesn’t matter. Well, yeah if he or she is a huge pain in the ass, that might be a problem. But otherwise, they’re worth keeping in touch. Abrasiveness never killed anyone, even better, such people are straight shooters. They’re not gonna lie in your face. And let’s face it, you’re gonna be offended only if you want to be offended.