Some people!
Some people feel they must, or rather, have a very real need it seems to butt in where they don’t belong or are not wanted, or both. Why? Here are a couple key hints: when someone says “that’s not what I was talking about” and then goes back to their conversation totally leaving you and your unwelcome comment our of it, back off! When someone says “I’ve got this” while holding up their hand in the international sign for stop talking and go away, give some serious thought to doing just that. If someone seems to be a perfectly functioning human being probably fully capable of accomplishing some inane duty or another, leave them alone and later, if warranted by some momentous mistake, you may revel in their inabilities and ignorance. Silently. In your own head. All in all, if you find yourself spontaneously drawn to events or conversations without invitation halfway through the progression of said event or conversation and are not typically met with sighs of relief or expressions of joy at your mere presence, reconsider opening your mouth at all, except maybe to eat or drink. All necessary communication can be effectively achieved with occasional head nodding. Thanks.