Why does Yahoo! Answers allow racist, ist, and generally bigoted questions?

Twice, I have had answers deleted to questions which, suffice it to say, bring sterotypes and ignorance to a nationwide audience. One of the questions invovled a candian that said that he did not want to "enter the USA illegally like all the mexicans do." And the other was asking if it was right to get a bill ped to allow the shooting of illegal immigrants. Those questions were not deleted but my responses of not wanting any more bigots in the USA to the candaian and ping a law to allow the shooting of the questioner were delted. I want to kow what the rest of this Answers community thinks. Should bigoted question be allowed to stay?