One particularly disruptive habit of certain people is what I call "rapid-fire AIMing" (since then I've also heard of people referring to it as diarrhea of the fingers, haha). It's when someone sends you many partially-thought out or incomplete messages in succession, causing you to be constantly interrupted to the point where you can no longer work on whatever you're doing, but end up having to pay full attention to each line as they drift in--until, at last, the sender's thoughts or request has finally achieved a level of coherence to enable a response.
Something like this, a contrived example I sent in frustration to a friend after one recent experience:
Please don't be a rapid-fire aimer. Take a moment to collect your thoughts into a reasonably coherent statement or question before aiming someone. Thank you.