Can you make it so your Yahoo! Answers questions don't appear on Google searches?

I'd prefer it, but it's not possible that I'm aware of.

Google uses the software equivalent of 'spiders' that crawl through accessible pages on the internet. They then index them and rank them according to how many times they're linked to or viewed.

To do this, Yahoo would have to make Answers an area you could not even get onto without a password.