The Chicago area butcher involved in Operation Snowplow is apparently still in business and dealing in lion meat. USDA regulations don't apply; the only government authority is basic FDA food safety stuff.
My knee jerk reaction is horror. Eating a lion is "just wrong". But I rail at other people who would ban things that I think are fine because they have no better reason than "it's just wrong". I have some thoughts, but I can't make a complete rational statement on this right now. I need to go to bed, so I can get up early tomorrow and take care of the animals that were seized in Operation Snowplow, because selling tiger meat is actually illegal.