here is one article:
http://www.telegraph.co.uk/foodanddrink/foodanddrinknews/10049064/Florida-taco-restaurants-roaring-trade-in-lion-meat-causes-storm-of-protest.html
and for those who dont know what happens to the lions and other animals before turning into tacos:
http://www.whitelionshomeland.org/?page_id=277
its not so much the fact you eat the meat of the lion. there are a lot of lions, as a matter of fact in south africa they need to cull entire lion families due to over population which unbalances the fenced in ecosystem. it is rather the way they are treated to become food, or bone brew for crazy asians. either way its not ethical imo but what is now a days.