You can identify them by their fruit, that is, by the way they act. Can you pick grapes from thornbushes, or figs from thistles? Matthew 7:16
Yes, I suppose that their just might be a place for fruit inspectors within the body of Christ. Might be…
But there’s a major flaw in some thinking here. People are not cans that need to be pried open to have their fruit inspected. Are they? Neither are they Tupperware containers of different opacities whereby others can examine their fruit in degrees of transparency. Fruit grows and should be visible. If it’s not visible yet, it seems presumptuous to pry someone open to see if there are any fruit inside so as to make judgments regarding their spiritual state.
There is certainly a level or purposed, or intentional transparency needed for others to grow. “Be imitators of me, brothers and sisters, and watch carefully those who are living this way, just as you have us as an example. For many live (about whom I often told you, and now say even with tears) as enemies of the cross of Christ.” Philippians 3:17-18
If one offends or sins against you directly, then it’s right to approach that person and discuss their “bad fruit.” Proverbs 25:9, Matthew 18:15 etc. But if the same person fails to recognize their offense or sin, then scripture also seems to indicate a bit of sanctioned prying.
So, do Christians have the right or obligation to pry into the lives of others? When?