If you receive a email or see a Facebook post that claims to have photos or a video of the missing airliner, do not click it. Malware can be spread through these links and questionnaires that are asking for your personal information are being shared on Facebook. There is not a reputable entity that would ask for your personal information in this way.
http://msisac.cisecurity.org/daily-tips/missing-malaysian-airliner-scams.cfm
http://abclocal.go.com/ktrk/story?section=news/national_world&id=9468767