Should Christians be held to a higher standard?

Lately my husband and I have been struggling with something.  A member of the church we attend recently got married which is wonderful.  They are expecting a baby which is also wonderful.  She conceived said baby before they were married which, in this day and age, isn't all that unusual.  Our concern is this individual leads worship, plays with the praise band and helps with the youth group.  This person has a very active Facebook page so I am sure everyone at church knows his situation. They know this couple were living together before they got married and they know how far along in her pregnancy she was when they married.  Our question and/or concern is....should this matter?  Shouldn't the church and the people who represent the church be held to a higher standard? Are we being to judgmental? Should we just ignore the fact that this couple was living in a way that isn't biblical or should we just accept it as the new normal?  This man interacts with the youth group.  Will the youth of the church look at his situation and think that behavior is okay?  Should we accept gossip, slandering, premarital sex, use of pornography, homosexual lifestyles...etc? Once again I have to say, that I am no saint, but I try, but I do not represent the church the way he does. This man helps lead worship.  I wonder if our pastor talked with him.  I wonder if any of the deacons talked with him.  I wonder if anyone cares.    Am I wrong to think the people at church, who profess to be Christians, should strive to live a life that is pleasing to God?  I know we are all broken and in need of grace and mercy but do we excuse the blatant disregard for what the bible teaches us about sex and marriage? Do we turn a blind eye when we see someone in the church openly committing a sin that could negatively impact the church?  Paul admonished the church in Corinth to judge those in the church committing sins, should we not do that in the modern church?  Are we intolerant or hateful if we do that today? 
 But now I am writing to you that you must not associate with anyone who claims to be a brother or sister but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people.

12What business is it of mine to judge those outside the church? Are you not to judge those inside? 13God will judge those outside. “Expel the wicked person from among you." 1Corinthians 5: 11-12

Not sure what we are to do with these feelings except pray for God to direct us in the path we should follow.