AnimeNewsNetwork.com has a information regarding a interesting poll.
68.2% of the people surveyed in Tokyo's Kantō area in April say that anime programs should not exercise self-restraint in the aftermath of the Great Eastern Japan Earthquake disaster ( Nihon Daishinsai).
The full article has the breakdowns and is definitely worth a read.After the March 11 earthquake and tsunami, many faced changes, edits, or preemptions due to disaster-related content. The Japanese call the tradition of exercising such self-restraint "jishuku." The affected anime included Precure All-Stars DX3 Mirai ni Todoke! Sekai o Tsunagu Niji-Iro no Hana, Oniichan no Koto Nanka Zenzen Suki Janain Dakara ne—!!, Tokyo Magnitude 8.0, the final episodes of Puella Magi Madoka Magica, and most recently, Gyakkyō Burai Kaiji: Hakairoku-hen.