It seems a bit ungrateful to deliberately set out to get a thread deleted, when people have taken time and effort to post answers your questions.
Once posted, questions and answers remain in the public domain. To manipulate them into being deleted for any reason other than the usual (offensive / obscene etc.)somehow seems to go against the spirit of Answerbank.
You could always re-register as a new user, and, using the Subscribe to question function, add only those questions you want to show him to the "subscribed threads" section of your new user name profile.
This, however, will not stop him stumbling across your old questions about "him and his son" if he knows your old identity.