So, to some extent it comes with a track record out of the box.
Not really, because you can't tell what it will accept that others haven't accepted because the valid chain is only built upon the accepted transactions and blocks. It's therefore only the confirmation of the sunny case, not the rainy cases.
If you are using your node to validate payments, the main feature you have it for is rejection - the rainy cases. "No, this is NOT a valid payment (or block)".
Not really, because you can't tell what it will accept that others haven't accepted because the valid chain is only built upon the accepted transactions and blocks. It's therefore only the confirmation of the sunny case, not the rainy cases.
If you are using your node to validate payments, the main feature you have it for is rejection - the rainy cases. "No, this is NOT a valid payment (or block)".