I believe if you really ( I'd call you weird for it ) wanted to pull your site off a SE you are able to contact their support and have it removed. Though i still say it would be weird. - John
it seems as if everyone depends on google. Im sure if you optimized for ask.com for example, you can still get thousands of hits from them. Or lycos, hotbot, etc
well if that will happen. The first thing that will suffer is the User/searches rather. they will be getting Luck of information and running out of different details particularly visitor who always used Lycos, Ask. etc. Because not all SEO's and or Webmasters do not have an interest or time to indexed their site for each and every SE.