Spate of deaths in recent months in Australia associated with charity containers
Mikki O Shea found in charity bin behind Gold Coast shopping centre on April 5
Alarrah Lawrence, 33, found hanging out of one of the bins on Tuesday morning
Sydney community organiser said he knew friends who relied on bins for shelter
Engineering expert said bins should be redesigned so rummagers can escape
Spencer Benbolt Jnr, 13, from Port Lincoln on South Australia s west coast, was killed when a skip bin he was sleeping in was emptied by a council worker at 5.20am on Tuesday.