Anybody who has your full tax records has your name, your current and previous addresses, social security number, how much you make, your place of work, the name(s) of your children (if you file as head of household or for child tax credits), etc. What makes you think this treasure trove of information isn't going be used for identity theft? It's like saying you have no objections to someone breaking into your car or house and stealing your stuff, so long as they don't take your driver's license or registration papers and pretend to be you.