The scrapers are probably doing lot of SEO optimization. It is time for stack overflow to hire some SEO services. Wikipedia is not monetizing in anyway other than donations whereas stackoverflow does display ads of its own so why not hire someone to do SEO and stay on top?
I think it is a good idea because how else an individual with no budget get his startup started :) I think this is part of bootstrapping, lending a hand and giving a fair chance,imho