#1: People Stop Trusting You
Think about it: aren’t you wary of someone who is frequently sarcastic with you? Well, if you’re the one being sarcastic, that’s the way others view you. They figure if you so easily make fun of them (even if it’s “all in good fun”), you’re not someone with whom they can share important things that matter to them. Now, if they know with 100% certainty that you care about them and the zingers are infrequent, then the jokes are just seen as jokes. But if either of those conditions are broken, people will doubt that you really care and will keep themselves at a distance.