Add more to the list (not always arcade related, but just general CL rants)...
Curb alerts - You know, when your either at work and/or miles away, never any contact info, just "at the curb, no holding, come and get it". I'm not wasting my time, gas & safety on a slim "chance" that it might still be there.
No price or $1 listings - more abuse of the service, just another way to either bait and switch and/or make sure your item is seen in search even if its out of the search range. Most of the time these are the sellers who think they are sitting on gold too. I usually tell them Ill take it for the listed price and see what they come back with.
To comment on late night calling, I wouldnt do it. Someone might post just before bedtime, or there might be other family members asleep during the post. Just email, call first thing in the morning and keep your fingers crossed.