The Australian Transportation Safety Bureau published its report in relation to a cargo hold smoke event involving a Boeing 737. http://www.atsb.gov.au/publications/investigation_reports/2014/aair/ao-2014-082.aspx
The smoke was detected by the airline Captain during the external inspection on the tarmac during preflights. The source of the smoke was later identified as being some LiPO batteries for a UAV. The passenger failed to declared the LiPOs when asked at check in. The ATSB revealed that the passenger was an Australian certified UAV operator.
Australian civil aviation safety regulations permit LiPO batteries to be transported as CARRY ON as long as they are <100WH and are packaged to prevent short circuits. http://www.casa.gov.au/wcmswr/_assets/main/dg/luggage/brochure.pdf
I frequently travel on aircraft with LiPO batteries, and before I travel all the terminals and balance leads are taped with electrical tape. They are stored in LiPO safe bags, and then transported in a pelican case as carry on.
It makes sense to take every precaution because I’d rather not be on a plane that crashes because of a LiPO fire.