In Hong Kong, lottery winners are guaranteed absolute anonymity and they will show up to claim their prizes with police escort and a bag on their head
There are cases of gangsters kidnapping and even killing lottery winners.
Didn't Whitey Bulger do this? IIRC, some guy came into a bar bragging about winning about $1 million in the lottery and having the ticket right in his pocket. Since an unsigned lottery ticket is basically a bearer bond, Bulger and his friends helped themselves to the ticket.