Rudeness is a disease?

I was reading this article on the scientific american and basically it says that just seeing rude behavior makes someone more likely to be rude. Now this is kind of interesting. If behavior is viral, I would imagine people who see a higher average or severity of toxic behavior are more likely to be toxic themselves. The only thing that would make this difficult for rioters to find is some people might be rude from what they've seen on xbox live or PSN. Or lets be honest, maybe someone liked to farm tears in eve or saw it done there and now they want to do so here.

Still. Let's all make a point to be nicer to others and not vent our aggression on them because the more you do, the more likely they are to respond in kind.