Are we losing this? A guy got a combined total of 8 months for this t-shirt.
http://www.guardian.co.uk/uk/2012/oct/11/manchester-man-jailed-tshirt-police?newsfeed=true

It's awful thing to have made and worn and you should never revel in anyone's death but honestly I think I've heard far worse jokes on Channel 4 panel shows. Facebook crimes are also being punished quite severely, some very justifiably but also some where the punishment does definitely not fit the crime.
Also, are authorities looking for bad stuff on the internet or do you have to be reported?