[quote=@Engel]
People who claim they want to do something, post a few times and then make up excuse after excuse as to why they're not posting before disappearing entirely. The worst is when they have the gall to give you attitude about anything later, had one of those not too long ago. 
[/quote]

Add to that, people who are impatient and jump to their own conclusions and infuriate themselves when their partner has clearly stated the required attention of other obligations; people who don't give polite nudges, but have the gall to complain in threads like these instead. Indeed, these are the worst kinds of people.