Would Yahoo Answers be a better place if they autodelete all questions containing the word "Obama" or "McCain"?

No we have to have this discussion.

Not necessarily; but it might help if they assigned someone to review such questions and remove the ones which are obvious trolls or snotty comments.

Then we would have hundreds of questions about "Ob_ma" and "M__ain," or similar name distortions.

If you outlaw specific words, people just make up other words that mean the same thing.

Then people would just use words like McSame, Failin, etc.

no. there are plenty of places you can go on Y/A if you're not interested in political discussion.

no, you are forgetting the entertainment aspect of the whole thing