Stop. Just Stop.
This may be the Slate-iest article of all time. I’m trying to decide if it’s just idiotic or if it’s actually an indicia of sociopathy. I realize that in some circles, saying goodbye can be up to an hour of potentially tedious conversations, but that’s just a reason to perhaps limit your goodbyes to the people you actually care about, or at minimum to just politely excuse yourself from any goodbye conversation taking longer than a few seconds. If you really need to get out of there quickly, at the very least common decency dictates that you let someone know you’re leaving.
Just walking away is considered rude for good reason- people who really care about you actually do wonder where you went when you suddenly disappear. If you consistently find that no one misses you when you don’t say goodbye, more likely it says something about the quality of your relationships than it says about the worth of a goodbye.