That cost-benefit analysis makes no sense if you had a pretty good scores. What's the point in fudging a few extra points if it means that diligence reveals you to be a liar?
It would also be somewhat suspicious if you went to a so-so college but allegedly had a perfect SAT. It would only make sense to lie if your score was well under 1600, you went to a college that makes sense for someone with a perfect SAT, and you didn't think it was likely they would follow up with a request for the official score report.