Anything over 50 means you're crazy.
I think there should be a deduction for FTFs. After all, you'd be crazy not to try for a FTF. So, let's say if your number of sweetj finds minus 5 times your number of sweetj FTFs is over 50, then you're crazy.
For example, I now have 81 sweetj finds; I think 11 are FTFs. 81-5*11=26, so I'm still sane.