This is not precedent, but sounds to me like the IRS is reconsidering deductions above winnings for professional gamblers. I'm sure everyone here reports all their winning.
http://www.irs.gov/pub/irs-utl/am2008013.pdf
This now refers to "Casual Gamblers"
http://www.irs.gov/taxtopics/tc419.html
http://www.irs.gov/pub/irs-utl/am2008013.pdf
This now refers to "Casual Gamblers"
http://www.irs.gov/taxtopics/tc419.html