If you are “saved” and know you are ‘saved” then it would not matter what actions you take because you have already made it and it would not matter how horrendous or little the sin would be. I’m just taking the argument to its logical conclusion.
That seems logical to you, but it’s not biblical. It’s certainly not how someone saved by the free grace of God should think. Once someone has been truly saved he hates his sin and is increasingly aware of, and grieved by, his sin. I could respond with numerous passages of Scripture, but I suggest you study Romans 6 in particular.
“What shall we say then? Shall we continue in sin, that grace may abound? God forbid. How shall we, that are dead to sin, live any longer therein?”
—Romans 6:1-2
“If you are “saved” and know you are ‘saved”...”
Right there is where your argument falls on its face. Nobody can truly know they are saved, we can only hope and have faith. Christ knows who is saved, but the rest of us can’t be so certain.
No, you are being ridiculous.