Couldn't Be Arsed

I am finding the British idiom "couldn't be arsed" very useful in the context of the annual Penguicon programming fail parade.

"...couldn't be arsed to tell the presenters before the con when their talks are scheduled."
"...couldn't be arsed to write one sentence for the program book describing a Nifty Guest."
"...couldn't be arsed to respond to the simplest email."
"...couldn't be arsed to read their own itinerary."
"...couldn't be arsed to attend even one concom meeting."