Ok. Well these are just four accounts of people who are suing over lottery pool wins. There are many more. The first one being one of the most recent.
http://www.lotterypost.com/news/169065
http://www.lotterypost.com/news/135957
http://www.lotterypost.com/news/135160
http://www.lotterypost.com/news/130962
By the way, I have relatives who are lawyers and a judge in the family! That doesn't mean anything. These claims may be frivolous or ludicrous, but that doesn't mean that someone can't file a lawsuit. It does happen. Too say it doesn't is silly. Just do a search and you can see it happens all the time. I'm not going to go looking for the actual case numbers and dates.