Snark Can Kill

http://lifehacker.com/5921655/the-snarky-voice-in-your-head-is-killing-your-productivity-heres-how-to-stop-it

"Snark/sarcasm/contempt is always an indicator that something else is going on in a given situation. When it's appropriate, it tells people that you're not going to let others push you around. When it's inappropriate it shows that you feel the need to make yourself "bigger" than others. That need to put one's self above others can be a symptom of depression or some personality disorders (of course, there would have to be other symptoms present to justify a diagnosis). That being said, perpetually putting others down can be indicative of insecurity, narcissism, negative thought patterns, or jealousy. If those things are present, then you definitely want to address it because it's likely to affect your relationships negatively."