I truly do love the book of Hebrews.  I guess you can tell.

Heb. 10: 26  "For if we sin willfully after we have received the knowledge of the truth, there remains no more sacrifice for sins."

One sacrifice.  Jesus.  You can't keep killing Him over and over.  The Jews have that religion.  They have to keep making sacrifices for sin over and over again--in anticipation of the Messiah.  We don't.  He died and paid for all our transgressions.  Once and for all.  The lamb of God.

We know from fulfillment of all the Jewish prophecies (as I recall, over 72 predictions) that Jesus was the Messiah.  Plus, the resurrection seals the deal.  He conquered death for us all.  One, if not "the", most validated events in all the records of history.

So sinning willfully isn't an option.  You either give Him control, or you don't.  Do we sin.  Of course.  But premeditated, willful sin is another matter.  There is a scripture in James 4:17 that says, "Therefore to him who knows to do good and does it not, to him it is sin."

So don't get into the trap of trying to be someone else's judge.  If they have the Holy Spirit--He--God,  will take care of it.  However, don't stick your head in the ground and say you don't know what God expects of you.  It's all there in His word.

Heb. 10: 30-31  "For we know Him who has said, Vengeance belongs to me says the Lord...And again, The lord shall judge his people...It is a fearful thing to fall into the hands of the living God."

Fearful.