This is more for a network client utility (rather than a game). So, if a user puts in dodgy stats, then they are essentially 'cheating' themselves.
Their dodgy stats wont have any effect on other users or the other users 'experience' within the app.
So, this is probably the option I will take (at this stage) to reduce development time. If the app becomes popular (dependent on completion of-course), I might up the security then.