What are some Simpsons controversies?

Well, it depends what you mean by controversies... but the careful viewer and die hard fan will note some attempts that the Simpson's episodes make references to whats happening in America today very subtly and make a sham of the laws For example in the episode "Smoke on the Daughter" Lisa says "what am I doing i don't need second hand smoke, i need first hand smoke!" right before she takes a puff homer takes it from her throws it on the ground and shoots the cigarette afterwards saying how easy it is for children to get cigarettes in this country, but he says this as he puts his pistol into his jacket revealing 3 other guns, i perceive this as not talking about cigarettes but guns and i believe this episode came out roughly a year after the Virgina tech shooting. The Simpson's also make references to Gay marriage, Drug Legalization, Homophobia, and Presidents/Election Campaigns. Other than this I don't believe there have been and Controversies Except for In the episode where The Simpson's Went to Brazil Apparently it Offended The Brazilian Government because it was made right after the Government used millions of dollars to promote Brazil I hope i gave you some insight on the controversies :) and KEEP WATCHING THE SIMPSON'S!!