An acquaintance of mine who was given an offer by Google, and arrived on the appointed day, brought the agreement, a red line, and a clean copy. They refused to make any change in their wording even though they said their intent was not to enforce the wording as written. They said that they couldn't sign it unless Google's intent was actually in the writing as well. That afternoon, Google asked for all the gear they had been issued back and rescinded their offer of employment.

Google's statement was that Google would not make any changes in the employment agreement and signing the agreement was a condition of employment, thus by refusing to sign the agreement, this person had 'voluntarily' chosen not to work at Google.

Can't really argue with their reasoning.